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@ -37,4 +37,4 @@ julia> onecold(ans, [:a, :b, :c])
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3-element Array{Symbol,1}:
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:b
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:a
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:b</code></pre><p>Note that these operations returned <code>OneHotVector</code> and <code>OneHotMatrix</code> rather than <code>Array</code>s. <code>OneHotVector</code>s behave like normal vectors but avoid any unnecessary cost compared to using an integer index directly. For example, multiplying a matrix with a one-hot vector simply slices out the relevant row of the matrix under the hood.</p></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../../models/nnlib/">« NNlib</a><a class="docs-footer-nextpage" href="../dataloader/">DataLoader »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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:b</code></pre><p>Note that these operations returned <code>OneHotVector</code> and <code>OneHotMatrix</code> rather than <code>Array</code>s. <code>OneHotVector</code>s behave like normal vectors but avoid any unnecessary cost compared to using an integer index directly. For example, multiplying a matrix with a one-hot vector simply slices out the relevant row of the matrix under the hood.</p></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../../models/nnlib/">« NNlib</a><a class="docs-footer-nextpage" href="../dataloader/">DataLoader »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -47,4 +47,4 @@ julia> x |> cpu
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10-element Array{Float32,1}:
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0.235164
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⋮
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0.192538</code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../training/training/">« Training</a><a class="docs-footer-nextpage" href="../saving/">Saving & Loading »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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0.192538</code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../training/training/">« Training</a><a class="docs-footer-nextpage" href="../saving/">Saving & Loading »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -24,4 +24,4 @@ Params([[0.66722 0.774872 0.249809; 0.843321 0.403843 0.429232; 0.683525 0.66245
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)
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ps = Flux.params(m[3:end])</code></pre><p>The <code>Zygote.Params</code> object <code>ps</code> now holds a reference to only the parameters of the layers passed to it.</p><p>During training, the gradients will only be computed for (and applied to) the last <code>Dense</code> layer, therefore only that would have its parameters changed.</p><p><code>Flux.params</code> also takes multiple inputs to make it easy to collect parameters from heterogenous models with a single call. A simple demonstration would be if we wanted to omit optimising the second <code>Dense</code> layer in the previous example. It would look something like this:</p><pre><code class="language-julia">Flux.params(m[1], m[3:end])</code></pre><p>Sometimes, a more fine-tuned control is needed. We can freeze a specific parameter of a specific layer which already entered a <code>Params</code> object <code>ps</code>, by simply deleting it from <code>ps</code>:</p><pre><code class="language-julia">ps = params(m)
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delete!(ps, m[2].b) </code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../layers/">« Model Reference</a><a class="docs-footer-nextpage" href="../nnlib/">NNlib »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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delete!(ps, m[2].b) </code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../layers/">« Model Reference</a><a class="docs-footer-nextpage" href="../nnlib/">NNlib »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -110,4 +110,4 @@ model2(rand(10)) # => 2-element vector</code></pre><p>This quickly starts to
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m(rand(10))</code></pre><p>Likewise, <code>Chain</code> will happily work with any Julia function.</p><pre><code class="language-julia">m = Chain(x -> x^2, x -> x+1)
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m(5) # => 26</code></pre><h2 id="Layer-helpers-1"><a class="docs-heading-anchor" href="#Layer-helpers-1">Layer helpers</a><a class="docs-heading-anchor-permalink" href="#Layer-helpers-1" title="Permalink"></a></h2><p>Flux provides a set of helpers for custom layers, which you can enable by calling</p><pre><code class="language-julia">Flux.@functor Affine</code></pre><p>This enables a useful extra set of functionality for our <code>Affine</code> layer, such as <a href="../../training/optimisers/">collecting its parameters</a> or <a href="../../gpu/">moving it to the GPU</a>.</p><p>For some more helpful tricks, including parameter freezing, please checkout the <a href="models/advacned.md">advanced usage guide</a>.</p><h2 id="Utility-functions-1"><a class="docs-heading-anchor" href="#Utility-functions-1">Utility functions</a><a class="docs-heading-anchor-permalink" href="#Utility-functions-1" title="Permalink"></a></h2><p>Flux provides some utility functions to help you generate models in an automated fashion.</p><p><code>outdims</code> enables you to calculate the spatial output dimensions of layers like <code>Conv</code> when applied to input images of a given size. Currently limited to the following layers:</p><ul><li><code>Chain</code></li><li><code>Dense</code></li><li><code>Conv</code></li><li><code>Diagonal</code></li><li><code>Maxout</code></li><li><code>ConvTranspose</code></li><li><code>DepthwiseConv</code></li><li><code>CrossCor</code></li><li><code>MaxPool</code></li><li><code>MeanPool</code></li></ul><div class="admonition is-warning"><header class="admonition-header">Missing docstring.</header><div class="admonition-body"><p>Missing docstring for <code>outdims</code>. Check Documenter's build log for details.</p></div></div></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../../">« Home</a><a class="docs-footer-nextpage" href="../recurrence/">Recurrence »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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m(5) # => 26</code></pre><h2 id="Layer-helpers-1"><a class="docs-heading-anchor" href="#Layer-helpers-1">Layer helpers</a><a class="docs-heading-anchor-permalink" href="#Layer-helpers-1" title="Permalink"></a></h2><p>Flux provides a set of helpers for custom layers, which you can enable by calling</p><pre><code class="language-julia">Flux.@functor Affine</code></pre><p>This enables a useful extra set of functionality for our <code>Affine</code> layer, such as <a href="../../training/optimisers/">collecting its parameters</a> or <a href="../../gpu/">moving it to the GPU</a>.</p><p>For some more helpful tricks, including parameter freezing, please checkout the <a href="models/advacned.md">advanced usage guide</a>.</p><h2 id="Utility-functions-1"><a class="docs-heading-anchor" href="#Utility-functions-1">Utility functions</a><a class="docs-heading-anchor-permalink" href="#Utility-functions-1" title="Permalink"></a></h2><p>Flux provides some utility functions to help you generate models in an automated fashion.</p><p><code>outdims</code> enables you to calculate the spatial output dimensions of layers like <code>Conv</code> when applied to input images of a given size. Currently limited to the following layers:</p><ul><li><code>Chain</code></li><li><code>Dense</code></li><li><code>Conv</code></li><li><code>Diagonal</code></li><li><code>Maxout</code></li><li><code>ConvTranspose</code></li><li><code>DepthwiseConv</code></li><li><code>CrossCor</code></li><li><code>MaxPool</code></li><li><code>MeanPool</code></li></ul><div class="admonition is-warning"><header class="admonition-header">Missing docstring.</header><div class="admonition-body"><p>Missing docstring for <code>outdims</code>. Check Documenter's build log for details.</p></div></div></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../../">« Home</a><a class="docs-footer-nextpage" href="../recurrence/">Recurrence »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -28,4 +28,4 @@ a = randomly sampled from uniform distribution U(l, u)</code></pre><p>Randomized
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batched_adjoint(A)</code></pre><p>Equivalent to applying <code>transpose</code> or <code>adjoint</code> to each matrix <code>A[:,:,k]</code>.</p><p>These exist to control how <code>batched_mul</code> behaves, as it operated on such matrix slices of an array with <code>ndims(A)==3</code>.</p><pre><code class="language-none">BatchedTranspose{T, N, S} <: AbstractBatchedMatrix{T, N}
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BatchedAdjoint{T, N, S}</code></pre><p>Lazy wrappers analogous to <code>Transpose</code> and <code>Adjoint</code>, returned by <code>batched_transpose</code></p></div></section></article><article class="docstring"><header><a class="docstring-binding" id="NNlib.batched_transpose" href="#NNlib.batched_transpose"><code>NNlib.batched_transpose</code></a> — <span class="docstring-category">Function</span></header><section><div><pre><code class="language-julia">batched_transpose(A::AbstractArray{T,3})
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batched_adjoint(A)</code></pre><p>Equivalent to applying <code>transpose</code> or <code>adjoint</code> to each matrix <code>A[:,:,k]</code>.</p><p>These exist to control how <code>batched_mul</code> behaves, as it operated on such matrix slices of an array with <code>ndims(A)==3</code>.</p><pre><code class="language-none">BatchedTranspose{T, N, S} <: AbstractBatchedMatrix{T, N}
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BatchedAdjoint{T, N, S}</code></pre><p>Lazy wrappers analogous to <code>Transpose</code> and <code>Adjoint</code>, returned by <code>batched_transpose</code></p></div></section></article></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../advanced/">« Advanced Model Building</a><a class="docs-footer-nextpage" href="../../data/onehot/">One-Hot Encoding »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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BatchedAdjoint{T, N, S}</code></pre><p>Lazy wrappers analogous to <code>Transpose</code> and <code>Adjoint</code>, returned by <code>batched_transpose</code></p></div></section></article></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../advanced/">« Advanced Model Building</a><a class="docs-footer-nextpage" href="../../data/onehot/">One-Hot Encoding »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -39,4 +39,4 @@ m = Flux.Recur(rnn, h)
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y = m(x)</code></pre><p>The <code>Recur</code> wrapper stores the state between runs in the <code>m.state</code> field.</p><p>If you use the <code>RNN(10, 5)</code> constructor – as opposed to <code>RNNCell</code> – you'll see that it's simply a wrapped cell.</p><pre><code class="language-julia">julia> RNN(10, 5)
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Recur(RNNCell(10, 5, tanh))</code></pre><h2 id="Sequences-1"><a class="docs-heading-anchor" href="#Sequences-1">Sequences</a><a class="docs-heading-anchor-permalink" href="#Sequences-1" title="Permalink"></a></h2><p>Often we want to work with sequences of inputs, rather than individual <code>x</code>s.</p><pre><code class="language-julia">seq = [rand(10) for i = 1:10]</code></pre><p>With <code>Recur</code>, applying our model to each element of a sequence is trivial:</p><pre><code class="language-julia">m.(seq) # returns a list of 5-element vectors</code></pre><p>This works even when we've chain recurrent layers into a larger model.</p><pre><code class="language-julia">m = Chain(LSTM(10, 15), Dense(15, 5))
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m.(seq)</code></pre><p>Finally, we can reset the hidden state of the cell back to its initial value using <code>reset!(m)</code>.</p></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../basics/">« Basics</a><a class="docs-footer-nextpage" href="../regularisation/">Regularisation »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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m.(seq)</code></pre><p>Finally, we can reset the hidden state of the cell back to its initial value using <code>reset!(m)</code>.</p></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../basics/">« Basics</a><a class="docs-footer-nextpage" href="../regularisation/">Regularisation »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -36,4 +36,4 @@ julia> activations(c, rand(10))
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Float32[0.5192045, 0.48079553]
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julia> sum(norm, ans)
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2.1166067f0</code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../recurrence/">« Recurrence</a><a class="docs-footer-nextpage" href="../layers/">Model Reference »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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2.1166067f0</code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../recurrence/">« Recurrence</a><a class="docs-footer-nextpage" href="../layers/">Model Reference »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -17,4 +17,4 @@ y_batch = reduce(hcat, ys)
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function loss_total(x_batch::Matrix, y_batch::Matrix)
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y_preds = model(x_batch)
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sum(loss.(y_preds, y_batch))
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end</code></pre><p>When doing this kind of concatenation use <code>reduce(hcat, xs)</code> rather than <code>hcat(xs...)</code>. This will avoid the splatting penalty, and will hit the optimised <code>reduce</code> method.</p></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../ecosystem/">« The Julia Ecosystem</a><a class="docs-footer-nextpage" href="../community/">Community »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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end</code></pre><p>When doing this kind of concatenation use <code>reduce(hcat, xs)</code> rather than <code>hcat(xs...)</code>. This will avoid the splatting penalty, and will hit the optimised <code>reduce</code> method.</p></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../ecosystem/">« The Julia Ecosystem</a><a class="docs-footer-nextpage" href="../community/">Community »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -47,4 +47,4 @@ evalcb = throttle(30) do
|
||||
# Show loss
|
||||
@save "model-checkpoint.bson" model
|
||||
end</code></pre><p>This will update the <code>"model-checkpoint.bson"</code> file every thirty seconds.</p><p>You can get more advanced by saving a series of models throughout training, for example</p><pre><code class="language-julia">@save "model-$(now()).bson" model</code></pre><p>will produce a series of models like <code>"model-2018-03-06T02:57:10.41.bson"</code>. You could also store the current test set loss, so that it's easy to (for example) revert to an older copy of the model if it starts to overfit.</p><pre><code class="language-julia">@save "model-$(now()).bson" model loss = testloss()</code></pre><p>You can even store optimiser state alongside the model, to resume training exactly where you left off.</p><pre><code class="language-julia">opt = ADAM()
|
||||
@save "model-$(now()).bson" model opt</code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../gpu/">« GPU Support</a><a class="docs-footer-nextpage" href="../ecosystem/">The Julia Ecosystem »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
|
||||
@save "model-$(now()).bson" model opt</code></pre></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../gpu/">« GPU Support</a><a class="docs-footer-nextpage" href="../ecosystem/">The Julia Ecosystem »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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@ -6,4 +6,4 @@ m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
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ga('create', 'UA-36890222-9', 'auto');
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ga('send', 'pageview', {'page': location.pathname + location.search + location.hash});
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</script><link href="https://fonts.googleapis.com/css?family=Lato|Roboto+Mono" rel="stylesheet" type="text/css"/><link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.11.2/css/fontawesome.min.css" rel="stylesheet" type="text/css"/><link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.11.2/css/solid.min.css" rel="stylesheet" type="text/css"/><link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.11.2/css/brands.min.css" rel="stylesheet" type="text/css"/><link href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.11.1/katex.min.css" rel="stylesheet" type="text/css"/><script>documenterBaseURL=".."</script><script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.6/require.min.js" data-main="../assets/documenter.js"></script><script src="../siteinfo.js"></script><script src="../../versions.js"></script><link href="../assets/flux.css" rel="stylesheet" type="text/css"/><link class="docs-theme-link" rel="stylesheet" type="text/css" href="../assets/themes/documenter-dark.css" data-theme-name="documenter-dark"/><link class="docs-theme-link" rel="stylesheet" type="text/css" href="../assets/themes/documenter-light.css" data-theme-name="documenter-light" data-theme-primary/><script src="../assets/themeswap.js"></script></head><body><div id="documenter"><nav class="docs-sidebar"><div class="docs-package-name"><span class="docs-autofit">Flux</span></div><form class="docs-search" action><input class="docs-search-query" id="documenter-search-query" name="q" type="text" placeholder="Search docs"/></form><ul class="docs-menu"><li><a class="tocitem" href="../">Home</a></li><li><span class="tocitem">Building Models</span><ul><li><a class="tocitem" href="../models/basics/">Basics</a></li><li><a class="tocitem" href="../models/recurrence/">Recurrence</a></li><li><a class="tocitem" href="../models/regularisation/">Regularisation</a></li><li><a class="tocitem" href="../models/layers/">Model Reference</a></li><li><a class="tocitem" href="../models/advanced/">Advanced Model Building</a></li><li><a class="tocitem" href="../models/nnlib/">NNlib</a></li></ul></li><li><span class="tocitem">Handling Data</span><ul><li><a class="tocitem" href="../data/onehot/">One-Hot Encoding</a></li><li><a class="tocitem" href="../data/dataloader/">DataLoader</a></li></ul></li><li><span class="tocitem">Training Models</span><ul><li><a class="tocitem" href="../training/optimisers/">Optimisers</a></li><li><a class="tocitem" href="../training/training/">Training</a></li></ul></li><li><a class="tocitem" href="../gpu/">GPU Support</a></li><li><a class="tocitem" href="../saving/">Saving & Loading</a></li><li><a class="tocitem" href="../ecosystem/">The Julia Ecosystem</a></li><li><a class="tocitem" href="../performance/">Performance Tips</a></li><li><a class="tocitem" href="../community/">Community</a></li></ul><div class="docs-version-selector field has-addons"><div class="control"><span class="docs-label button is-static is-size-7">Version</span></div><div class="docs-selector control is-expanded"><div class="select is-fullwidth is-size-7"><select id="documenter-version-selector"></select></div></div></div></nav><div class="docs-main"><header class="docs-navbar"><nav class="breadcrumb"><ul class="is-hidden-mobile"><li class="is-active"><a href>Search</a></li></ul><ul class="is-hidden-tablet"><li class="is-active"><a href>Search</a></li></ul></nav><div class="docs-right"><a class="docs-settings-button fas fa-cog" id="documenter-settings-button" href="#" title="Settings"></a><a class="docs-sidebar-button fa fa-bars is-hidden-desktop" id="documenter-sidebar-button" href="#"></a></div></header><article><p id="documenter-search-info">Loading search...</p><ul id="documenter-search-results"></ul></article></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body><script src="../search_index.js"></script><script src="../assets/search.js"></script></html>
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|
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|
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@ -28,7 +28,7 @@ end</code></pre><p>Running this will alter the parameters <code>W</code> and <co
|
||||
for p in (W, b)
|
||||
update!(opt, p, grads[p])
|
||||
end</code></pre><p>An optimiser <code>update!</code> accepts a parameter and a gradient, and updates the parameter according to the chosen rule. We can also pass <code>opt</code> to our <a href="../training/">training loop</a>, which will update all parameters of the model in a loop. However, we can now easily replace <code>Descent</code> with a more advanced optimiser such as <code>ADAM</code>.</p><h2 id="Optimiser-Reference-1"><a class="docs-heading-anchor" href="#Optimiser-Reference-1">Optimiser Reference</a><a class="docs-heading-anchor-permalink" href="#Optimiser-Reference-1" title="Permalink"></a></h2><p>All optimisers return an object that, when passed to <code>train!</code>, will update the parameters passed to it.</p><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.update!" href="#Flux.Optimise.update!"><code>Flux.Optimise.update!</code></a> — <span class="docstring-category">Function</span></header><section><div><pre><code class="language-julia">update!(opt, p, g)
|
||||
update!(opt, ps::Params, gs)</code></pre><p>Perform an update step of the parameters <code>ps</code> (or the single parameter <code>p</code>) according to optimizer <code>opt</code> and the gradients <code>gs</code> (the gradient <code>g</code>).</p><p>As a result, the parameters are mutated and the optimizer's internal state may change. </p><p>update!(x, x̄)</p><p>Update the array <code>x</code> according to <code>x .-= x̄</code>.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/train.jl#L5-L17">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.Descent" href="#Flux.Optimise.Descent"><code>Flux.Optimise.Descent</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">Descent(η)</code></pre><p>Classic gradient descent optimiser with learning rate <code>η</code>. For each parameter <code>p</code> and its gradient <code>δp</code>, this runs <code>p -= η*δp</code></p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): The amount by which the gradients are discounted before updating the weights. Defaults to <code>0.1</code>.</li></ul><p><strong>Example</strong></p><pre><code class="language-julia-repl">opt = Descent() # uses default η (0.1)
|
||||
update!(opt, ps::Params, gs)</code></pre><p>Perform an update step of the parameters <code>ps</code> (or the single parameter <code>p</code>) according to optimizer <code>opt</code> and the gradients <code>gs</code> (the gradient <code>g</code>).</p><p>As a result, the parameters are mutated and the optimizer's internal state may change. </p><p>update!(x, x̄)</p><p>Update the array <code>x</code> according to <code>x .-= x̄</code>.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/train.jl#L5-L17">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.Descent" href="#Flux.Optimise.Descent"><code>Flux.Optimise.Descent</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">Descent(η)</code></pre><p>Classic gradient descent optimiser with learning rate <code>η</code>. For each parameter <code>p</code> and its gradient <code>δp</code>, this runs <code>p -= η*δp</code></p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): The amount by which the gradients are discounted before updating the weights. Defaults to <code>0.1</code>.</li></ul><p><strong>Example</strong></p><pre><code class="language-julia-repl">opt = Descent() # uses default η (0.1)
|
||||
|
||||
opt = Descent(0.3) # use provided η
|
||||
|
||||
@ -38,23 +38,23 @@ gs = gradient(ps) do
|
||||
loss(x, y)
|
||||
end
|
||||
|
||||
Flux.Optimise.update!(opt, ps, gs)</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L8-L31">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.Momentum" href="#Flux.Optimise.Momentum"><code>Flux.Optimise.Momentum</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">Momentum(η, ρ)</code></pre><p>Gradient descent with learning rate <code>η</code> and momentum <code>ρ</code>.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (<code>η</code>): Amount by which gradients are discounted before updating the weights. Defaults to <code>0.01</code>.</li><li>Momentum (<code>ρ</code>): Parameter that accelerates descent in the relevant direction and dampens oscillations. Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = Momentum() # uses defaults of η = 0.01 and ρ = 0.9
|
||||
Flux.Optimise.update!(opt, ps, gs)</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L8-L31">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.Momentum" href="#Flux.Optimise.Momentum"><code>Flux.Optimise.Momentum</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">Momentum(η, ρ)</code></pre><p>Gradient descent with learning rate <code>η</code> and momentum <code>ρ</code>.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (<code>η</code>): Amount by which gradients are discounted before updating the weights. Defaults to <code>0.01</code>.</li><li>Momentum (<code>ρ</code>): Parameter that accelerates descent in the relevant direction and dampens oscillations. Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = Momentum() # uses defaults of η = 0.01 and ρ = 0.9
|
||||
|
||||
opt = Momentum(0.01, 0.99)</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L42-L57">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.Nesterov" href="#Flux.Optimise.Nesterov"><code>Flux.Optimise.Nesterov</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">Nesterov(η, ρ)</code></pre><p>Gradient descent with learning rate <code>η</code> and Nesterov momentum <code>ρ</code>.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Amount by which the gradients are dicsounted berfore updating the weights. Defaults to <code>0.001</code>.</li><li>Nesterov Momentum (ρ): Parameters controlling the amount of nesterov momentum to be applied. Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = Nesterov() # uses defaults η = 0.001 and ρ = 0.9
|
||||
opt = Momentum(0.01, 0.99)</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L42-L57">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.Nesterov" href="#Flux.Optimise.Nesterov"><code>Flux.Optimise.Nesterov</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">Nesterov(η, ρ)</code></pre><p>Gradient descent with learning rate <code>η</code> and Nesterov momentum <code>ρ</code>.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Amount by which the gradients are dicsounted berfore updating the weights. Defaults to <code>0.001</code>.</li><li>Nesterov Momentum (ρ): Parameters controlling the amount of nesterov momentum to be applied. Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = Nesterov() # uses defaults η = 0.001 and ρ = 0.9
|
||||
|
||||
opt = Nesterov(0.003, 0.95)</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L73-L88">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.RMSProp" href="#Flux.Optimise.RMSProp"><code>Flux.Optimise.RMSProp</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">RMSProp(η, ρ)</code></pre><p>Implements the RMSProp algortihm. Often a good choice for recurrent networks. Parameters other than learning rate generally don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Rho (ρ): Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = RMSProp() # uses default η = 0.001 and ρ = 0.9
|
||||
opt = Nesterov(0.003, 0.95)</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L73-L88">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.RMSProp" href="#Flux.Optimise.RMSProp"><code>Flux.Optimise.RMSProp</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">RMSProp(η, ρ)</code></pre><p>Implements the RMSProp algortihm. Often a good choice for recurrent networks. Parameters other than learning rate generally don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Rho (ρ): Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = RMSProp() # uses default η = 0.001 and ρ = 0.9
|
||||
|
||||
opt = RMSProp(0.002, 0.95)</code></pre><p><strong>References</strong></p><p><a href="https://www.cs.toronto.edu/~tijmen/csc321/slides/lecture_slides_lec6.pdf">RMSProp</a></p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L105-L123">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADAM" href="#Flux.Optimise.ADAM"><code>Flux.Optimise.ADAM</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">ADAM(η, β::Tuple)</code></pre><p>Implements the ADAM optimiser.</p><p><strong>Paramters</strong></p><ul><li>Learning Rate (<code>η</code>): Defaults to <code>0.001</code>.</li><li>Beta (<code>β::Tuple</code>): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADAM() # uses the default η = 0.001 and β = (0.9, 0.999)
|
||||
opt = RMSProp(0.002, 0.95)</code></pre><p><strong>References</strong></p><p><a href="https://www.cs.toronto.edu/~tijmen/csc321/slides/lecture_slides_lec6.pdf">RMSProp</a></p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L105-L123">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADAM" href="#Flux.Optimise.ADAM"><code>Flux.Optimise.ADAM</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">ADAM(η, β::Tuple)</code></pre><p>Implements the ADAM optimiser.</p><p><strong>Paramters</strong></p><ul><li>Learning Rate (<code>η</code>): Defaults to <code>0.001</code>.</li><li>Beta (<code>β::Tuple</code>): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADAM() # uses the default η = 0.001 and β = (0.9, 0.999)
|
||||
|
||||
opt = ADAM(0.001, (0.9, 0.8))</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1412.6980v8">ADAM</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L139-L157">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.AdaMax" href="#Flux.Optimise.AdaMax"><code>Flux.Optimise.AdaMax</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">AdaMax(η, β::Tuple)</code></pre><p>Variant of ADAM based on ∞-norm.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code></li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = AdaMax() # uses default η and β
|
||||
opt = ADAM(0.001, (0.9, 0.8))</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1412.6980v8">ADAM</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L139-L157">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.AdaMax" href="#Flux.Optimise.AdaMax"><code>Flux.Optimise.AdaMax</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">AdaMax(η, β::Tuple)</code></pre><p>Variant of ADAM based on ∞-norm.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code></li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = AdaMax() # uses default η and β
|
||||
|
||||
opt = AdaMax(0.001, (0.9, 0.995))</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1412.6980v9">AdaMax</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L221-L238">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADAGrad" href="#Flux.Optimise.ADAGrad"><code>Flux.Optimise.ADAGrad</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">ADAGrad(η)</code></pre><p>Implements AdaGrad. It has parameter specific learning rates based on how frequently it is updated.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.1</code></li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADAGrad() # uses default η = 0.1
|
||||
opt = AdaMax(0.001, (0.9, 0.995))</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1412.6980v9">AdaMax</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L221-L238">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADAGrad" href="#Flux.Optimise.ADAGrad"><code>Flux.Optimise.ADAGrad</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">ADAGrad(η)</code></pre><p>Implements AdaGrad. It has parameter specific learning rates based on how frequently it is updated.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.1</code></li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADAGrad() # uses default η = 0.1
|
||||
|
||||
opt = ADAGrad(0.001)</code></pre><p><strong>References</strong></p><p><a href="http://www.jmlr.org/papers/volume12/duchi11a/duchi11a.pdf">ADAGrad</a> optimiser. Parameters don't need tuning.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L257-L275">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADADelta" href="#Flux.Optimise.ADADelta"><code>Flux.Optimise.ADADelta</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">ADADelta(ρ)</code></pre><p>Version of ADAGrad that adapts learning rate based on a window of past gradient updates. Parameters don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Rho (ρ): Factor by which gradient is decayed at each time step. Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADADelta() # uses default ρ = 0.9
|
||||
opt = ADADelta(0.89)</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1212.5701">ADADelta</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L290-L306">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.AMSGrad" href="#Flux.Optimise.AMSGrad"><code>Flux.Optimise.AMSGrad</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">AMSGrad(η, β::Tuple)</code></pre><p>Implements AMSGrad version of the ADAM optimiser. Parameters don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = AMSGrad() # uses default η and β
|
||||
opt = AMSGrad(0.001, (0.89, 0.995))</code></pre><p><strong>References</strong></p><p><a href="https://openreview.net/forum?id=ryQu7f-RZ">AMSGrad</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L323-L340">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.NADAM" href="#Flux.Optimise.NADAM"><code>Flux.Optimise.NADAM</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">NADAM(η, β::Tuple)</code></pre><p>Nesterov variant of ADAM. Parameters don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = NADAM() # uses default η and β
|
||||
opt = NADAM(0.002, (0.89, 0.995))</code></pre><p><strong>References</strong></p><p><a href="http://cs229.stanford.edu/proj2015/054_report.pdf">NADAM</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L358-L375">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADAMW" href="#Flux.Optimise.ADAMW"><code>Flux.Optimise.ADAMW</code></a> — <span class="docstring-category">Function</span></header><section><div><pre><code class="language-julia">ADAMW(η, β::Tuple, decay)</code></pre><p>Variant of ADAM defined by fixing weight decay regularization.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to (0.9, 0.999).</li><li>decay: Decay applied to weights during optimisation. Defaults to 0.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADAMW() # uses default η, β and decay
|
||||
opt = ADAMW(0.001, (0.89, 0.995), 0.1)</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1711.05101">ADAMW</a></p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L394-L412">source</a></section></article><h2 id="Optimiser-Interface-1"><a class="docs-heading-anchor" href="#Optimiser-Interface-1">Optimiser Interface</a><a class="docs-heading-anchor-permalink" href="#Optimiser-Interface-1" title="Permalink"></a></h2><p>Flux's optimisers are built around a <code>struct</code> that holds all the optimiser parameters along with a definition of how to apply the update rule associated with it. We do this via the <code>apply!</code> function which takes the optimiser as the first argument followed by the parameter and its corresponding gradient.</p><p>In this manner Flux also allows one to create custom optimisers to be used seamlessly. Let's work this with a simple example.</p><pre><code class="language-julia">mutable struct Momentum
|
||||
opt = ADAGrad(0.001)</code></pre><p><strong>References</strong></p><p><a href="http://www.jmlr.org/papers/volume12/duchi11a/duchi11a.pdf">ADAGrad</a> optimiser. Parameters don't need tuning.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L257-L275">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADADelta" href="#Flux.Optimise.ADADelta"><code>Flux.Optimise.ADADelta</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">ADADelta(ρ)</code></pre><p>Version of ADAGrad that adapts learning rate based on a window of past gradient updates. Parameters don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Rho (ρ): Factor by which gradient is decayed at each time step. Defaults to <code>0.9</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADADelta() # uses default ρ = 0.9
|
||||
opt = ADADelta(0.89)</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1212.5701">ADADelta</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L290-L306">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.AMSGrad" href="#Flux.Optimise.AMSGrad"><code>Flux.Optimise.AMSGrad</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">AMSGrad(η, β::Tuple)</code></pre><p>Implements AMSGrad version of the ADAM optimiser. Parameters don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = AMSGrad() # uses default η and β
|
||||
opt = AMSGrad(0.001, (0.89, 0.995))</code></pre><p><strong>References</strong></p><p><a href="https://openreview.net/forum?id=ryQu7f-RZ">AMSGrad</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L323-L340">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.NADAM" href="#Flux.Optimise.NADAM"><code>Flux.Optimise.NADAM</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">NADAM(η, β::Tuple)</code></pre><p>Nesterov variant of ADAM. Parameters don't need tuning.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to <code>(0.9, 0.999)</code>.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = NADAM() # uses default η and β
|
||||
opt = NADAM(0.002, (0.89, 0.995))</code></pre><p><strong>References</strong></p><p><a href="http://cs229.stanford.edu/proj2015/054_report.pdf">NADAM</a> optimiser.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L358-L375">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ADAMW" href="#Flux.Optimise.ADAMW"><code>Flux.Optimise.ADAMW</code></a> — <span class="docstring-category">Function</span></header><section><div><pre><code class="language-julia">ADAMW(η, β::Tuple, decay)</code></pre><p>Variant of ADAM defined by fixing weight decay regularization.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (η): Defaults to <code>0.001</code>.</li><li>Beta (β::Tuple): The first element refers to β1 and the second to β2. Defaults to (0.9, 0.999).</li><li>decay: Decay applied to weights during optimisation. Defaults to 0.</li></ul><p><strong>Examples</strong></p><pre><code class="language-julia">opt = ADAMW() # uses default η, β and decay
|
||||
opt = ADAMW(0.001, (0.89, 0.995), 0.1)</code></pre><p><strong>References</strong></p><p><a href="https://arxiv.org/abs/1711.05101">ADAMW</a></p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L394-L412">source</a></section></article><h2 id="Optimiser-Interface-1"><a class="docs-heading-anchor" href="#Optimiser-Interface-1">Optimiser Interface</a><a class="docs-heading-anchor-permalink" href="#Optimiser-Interface-1" title="Permalink"></a></h2><p>Flux's optimisers are built around a <code>struct</code> that holds all the optimiser parameters along with a definition of how to apply the update rule associated with it. We do this via the <code>apply!</code> function which takes the optimiser as the first argument followed by the parameter and its corresponding gradient.</p><p>In this manner Flux also allows one to create custom optimisers to be used seamlessly. Let's work this with a simple example.</p><pre><code class="language-julia">mutable struct Momentum
|
||||
eta
|
||||
rho
|
||||
velocity
|
||||
@ -81,4 +81,4 @@ for t = 1:10^5
|
||||
end
|
||||
|
||||
loss(rand(10)) # around 0.9</code></pre><p>In this manner it is possible to compose optimisers for some added flexibility.</p><h2 id="Decays-1"><a class="docs-heading-anchor" href="#Decays-1">Decays</a><a class="docs-heading-anchor-permalink" href="#Decays-1" title="Permalink"></a></h2><p>Similar to optimisers, Flux also defines some simple decays that can be used in conjunction with other optimisers, or standalone.</p><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.ExpDecay" href="#Flux.Optimise.ExpDecay"><code>Flux.Optimise.ExpDecay</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">ExpDecay(eta, decay, decay_step, clip)</code></pre><p>Discount the learning rate <code>eta</code> by a multiplicative factor <code>decay</code> every <code>decay_step</code> till a minimum of <code>clip</code>.</p><p><strong>Parameters</strong></p><ul><li>Learning Rate (eta): Defaults to <code>0.001</code>.</li><li>decay: Factor by which the learning rate is discounted. Defaults to <code>0.1</code>.</li><li>decay_step: Schedules decay operations by setting number of steps between two decay operations. Defaults to <code>1000</code>.</li><li>clip: Minimum value of learning rate. Defaults to <code>1e-4</code>.</li></ul><p><strong>Example</strong></p><p>To apply exponential decay to an optimiser:</p><pre><code class="language-julia">Optimiser(ExpDecay(..), Opt(..))
|
||||
opt = Optimiser(ExpDecay(), ADAM())</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L471-L488">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.InvDecay" href="#Flux.Optimise.InvDecay"><code>Flux.Optimise.InvDecay</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">InvDecay(γ)</code></pre><p>Applies inverse time decay to an optimiser, i.e., the effective step size at iteration <code>n</code> is <code>eta / (1 + γ * n)</code> where <code>eta</code> is the initial step size. The wrapped optimiser's step size is not modified.</p><p><strong>Parameters</strong></p><ul><li>gamma (γ): Defaults to <code>0.001</code></li></ul><p><strong>Example</strong></p><pre><code class="language-julia">Optimiser(InvDecay(..), Opt(..))</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L443-L455">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.WeightDecay" href="#Flux.Optimise.WeightDecay"><code>Flux.Optimise.WeightDecay</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">WeightDecay(wd)</code></pre><p>Decays the weight by <code>wd</code></p><p><strong>Parameters</strong></p><ul><li>weight decay (wd): 0</li></ul></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/1605a010398ea2dae423ca8e346d19e213594de5/src/optimise/optimisers.jl#L509-L516">source</a></section></article></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../../data/dataloader/">« DataLoader</a><a class="docs-footer-nextpage" href="../training/">Training »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Saturday 14 March 2020 10:25">Saturday 14 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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opt = Optimiser(ExpDecay(), ADAM())</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L471-L488">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.InvDecay" href="#Flux.Optimise.InvDecay"><code>Flux.Optimise.InvDecay</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">InvDecay(γ)</code></pre><p>Applies inverse time decay to an optimiser, i.e., the effective step size at iteration <code>n</code> is <code>eta / (1 + γ * n)</code> where <code>eta</code> is the initial step size. The wrapped optimiser's step size is not modified.</p><p><strong>Parameters</strong></p><ul><li>gamma (γ): Defaults to <code>0.001</code></li></ul><p><strong>Example</strong></p><pre><code class="language-julia">Optimiser(InvDecay(..), Opt(..))</code></pre></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L443-L455">source</a></section></article><article class="docstring"><header><a class="docstring-binding" id="Flux.Optimise.WeightDecay" href="#Flux.Optimise.WeightDecay"><code>Flux.Optimise.WeightDecay</code></a> — <span class="docstring-category">Type</span></header><section><div><pre><code class="language-julia">WeightDecay(wd)</code></pre><p>Decays the weight by <code>wd</code></p><p><strong>Parameters</strong></p><ul><li>weight decay (wd): 0</li></ul></div><a class="docs-sourcelink" target="_blank" href="https://github.com/FluxML/Flux.jl/blob/240ab1147f5f49da24f5335de64a2725088dca7d/src/optimise/optimisers.jl#L509-L516">source</a></section></article></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../../data/dataloader/">« DataLoader</a><a class="docs-footer-nextpage" href="../training/">Training »</a></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> on <span class="colophon-date" title="Sunday 22 March 2020 06:56">Sunday 22 March 2020</span>. Using Julia version 1.3.1.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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