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Merge pull request #1 from FluxML/master

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Shreyas Kowshik 2019-03-24 14:31:59 +05:30 committed by GitHub
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14 changed files with 256 additions and 63 deletions
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20
Manifest.toml
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@ -84,7 +84,7 @@ uuid = "b552c78f-8df3-52c6-915a-8e097449b14b"
version = "0.0.10" version = "0.0.10"
[[Distributed]] [[Distributed]]
deps = ["Random", "Serialization", "Sockets"] deps = ["LinearAlgebra", "Random", "Serialization", "Sockets"]
uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b" uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
[[FixedPointNumbers]] [[FixedPointNumbers]]
@ -100,14 +100,14 @@ uuid = "f6369f11-7733-5829-9624-2563aa707210"
version = "0.10.3" version = "0.10.3"
[[InteractiveUtils]] [[InteractiveUtils]]
deps = ["Markdown"] deps = ["LinearAlgebra", "Markdown"]
uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240" uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
[[Juno]] [[Juno]]
deps = ["Base64", "Logging", "Media", "Profile", "Test"] deps = ["Base64", "Logging", "Media", "Profile", "Test"]
git-tree-sha1 = "ce6246e19061e36cbdce954caaae717498daeed8" git-tree-sha1 = "4e4a8d43aa7ecec66cadaf311fbd1e5c9d7b9175"
uuid = "e5e0dc1b-0480-54bc-9374-aad01c23163d" uuid = "e5e0dc1b-0480-54bc-9374-aad01c23163d"
version = "0.5.4" version = "0.7.0"
[[LibGit2]] [[LibGit2]]
uuid = "76f85450-5226-5b5a-8eaa-529ad045b433" uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
@ -149,11 +149,9 @@ uuid = "a63ad114-7e13-5084-954f-fe012c677804"
[[NNlib]] [[NNlib]]
deps = ["Libdl", "LinearAlgebra", "MacroTools", "Requires", "Test"] deps = ["Libdl", "LinearAlgebra", "MacroTools", "Requires", "Test"]
git-tree-sha1 = "9ac5cd21484189339b27840818c4882d1b6df7fd" git-tree-sha1 = "d07ac0bfd3c71c3a29bc9c22becbba19227bbeb5"
repo-rev = "master"
repo-url = "https://github.com/FluxML/NNlib.jl.git"
uuid = "872c559c-99b0-510c-b3b7-b6c96a88d5cd" uuid = "872c559c-99b0-510c-b3b7-b6c96a88d5cd"
version = "0.4.3+" version = "0.5.0"
[[NaNMath]] [[NaNMath]]
deps = ["Compat"] deps = ["Compat"]
@ -256,9 +254,9 @@ version = "0.1.0"
[[TranscodingStreams]] [[TranscodingStreams]]
deps = ["Pkg", "Random", "Test"] deps = ["Pkg", "Random", "Test"]
git-tree-sha1 = "90f845c65c50bc57d6ffc815dbab2a4003ccf75c" git-tree-sha1 = "f42956022d8084539f1d7219f632542b0ea686ce"
uuid = "3bb67fe8-82b1-5028-8e26-92a6c54297fa" uuid = "3bb67fe8-82b1-5028-8e26-92a6c54297fa"
version = "0.9.1" version = "0.9.3"
[[URIParser]] [[URIParser]]
deps = ["Test", "Unicode"] deps = ["Test", "Unicode"]
@ -267,7 +265,7 @@ uuid = "30578b45-9adc-5946-b283-645ec420af67"
version = "0.4.0" version = "0.4.0"
[[UUIDs]] [[UUIDs]]
deps = ["Random", "SHA"] deps = ["Random"]
uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4" uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
[[Unicode]] [[Unicode]]

2
NEWS.md
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@ -9,6 +9,8 @@
* New "performance tips" [section of the docs](https://github.com/FluxML/Flux.jl/pull/615). * New "performance tips" [section of the docs](https://github.com/FluxML/Flux.jl/pull/615).
* The training loop is [now more readable](https://github.com/FluxML/Flux.jl/pull/651) and better shows how to use the lower-level APIs. * The training loop is [now more readable](https://github.com/FluxML/Flux.jl/pull/651) and better shows how to use the lower-level APIs.
* New [AlphaDropout](https://github.com/FluxML/Flux.jl/pull/656). * New [AlphaDropout](https://github.com/FluxML/Flux.jl/pull/656).
* [Data.Iris](https://github.com/FluxML/Flux.jl/pull/652) makes Fisher's Iris dataset available with `Iris.labels` and `Iris.features`.
* New [InstanceNorm](https://github.com/FluxML/Flux.jl/pull/634), as popularized by [Instance Normalization: The Missing Ingredient for Fast Stylization](https://arxiv.org/abs/1607.08022).
AD Changes: AD Changes:

1
Project.toml
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@ -6,6 +6,7 @@ AbstractTrees = "1520ce14-60c1-5f80-bbc7-55ef81b5835c"
Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e" Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
CodecZlib = "944b1d66-785c-5afd-91f1-9de20f533193" CodecZlib = "944b1d66-785c-5afd-91f1-9de20f533193"
Colors = "5ae59095-9a9b-59fe-a467-6f913c188581" Colors = "5ae59095-9a9b-59fe-a467-6f913c188581"
DelimitedFiles = "8bb1440f-4735-579b-a4ab-409b98df4dab"
Juno = "e5e0dc1b-0480-54bc-9374-aad01c23163d" Juno = "e5e0dc1b-0480-54bc-9374-aad01c23163d"
LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e" LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09" MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"

1
REQUIRE
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@ -10,3 +10,4 @@ ZipFile
AbstractTrees AbstractTrees
Reexport Reexport
StatsBase StatsBase
Tracker

31
docs/src/models/layers.md
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@ -5,14 +5,16 @@ These core layers form the foundation of almost all neural networks.
```@docs ```@docs
Chain Chain
Dense Dense
```
## Convolution and Pooling Layers
These layers are used to build convolutional neural networks (CNNs).
```@docs
Conv Conv
MaxPool MaxPool
MeanPool MeanPool
```
## Additional Convolution Layers
```@docs
DepthwiseConv DepthwiseConv
ConvTranspose ConvTranspose
``` ```
@ -28,6 +30,25 @@ GRU
Flux.Recur Flux.Recur
``` ```
## Other General Purpose Layers
These are marginally more obscure than the Basic Layers.
But in contrast to the layers described in the other sections are not readily grouped around a particular purpose (e.g. CNNs or RNNs).
```@docs
Maxout
```
# Normalisation & Regularisation
These layers don't affect the structure of the network but may improve training times or reduce overfitting.
```@docs
Flux.testmode!
BatchNorm
Dropout
LayerNorm
```
## Activation Functions ## Activation Functions
Non-linearities that go between layers of your model. Most of these functions are defined in [NNlib](https://github.com/FluxML/NNlib.jl) but are available by default in Flux. Non-linearities that go between layers of your model. Most of these functions are defined in [NNlib](https://github.com/FluxML/NNlib.jl) but are available by default in Flux.

6
src/Flux.jl
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@ -6,8 +6,10 @@ using Base: tail
using MacroTools, Juno, Requires, Reexport, Statistics, Random using MacroTools, Juno, Requires, Reexport, Statistics, Random
using MacroTools: @forward using MacroTools: @forward
export Chain, Dense, RNN, LSTM, GRU, Conv, ConvTranspose, MaxPool, MeanPool, export Chain, Dense, Maxout,
DepthwiseConv, Dropout, AlphaDropout, LayerNorm, BatchNorm, InstanceNorm, RNN, LSTM, GRU,
Conv, ConvTranspose, MaxPool, MeanPool, DepthwiseConv,
Dropout, AlphaDropout, LayerNorm, BatchNorm, InstanceNorm,
params, mapleaves, cpu, gpu, f32, f64 params, mapleaves, cpu, gpu, f32, f64
@reexport using NNlib @reexport using NNlib

9
src/cuda/cuda.jl
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@ -1,17 +1,18 @@
module CUDA module CUDA
using ..CuArrays using ..CuArrays
import ..CuArrays.CUDAdrv: CuPtr, CU_NULL
using Pkg.TOML using Pkg.TOML
function version_check() function version_check()
minor_version = 9 major_version = 1
project = joinpath(dirname(pathof(CuArrays)), "../Project.toml") project = joinpath(dirname(pathof(CuArrays)), "../Project.toml")
project = TOML.parse(String(read(project))) project = TOML.parse(String(read(project)))
version = VersionNumber(get(project, "version", "0.0.0")) version = VersionNumber(get(project, "version", "0.0.0"))
if !(version.major == 0 && version.minor == minor_version) if version.major != major_version
@warn """ @warn """
Flux is only supported with CuArrays v0.$minor_version. Flux is only supported with CuArrays v$major_version.x.
Try running `] pin CuArrays@0.$minor_version`. Try running `] pin CuArrays@$major_version`.
""" """
end end
end end

36
src/cuda/cudnn.jl
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@ -17,7 +17,7 @@ function DropoutDesc(ρ::Real; seed::Integer=0)
@check ccall((:cudnnDropoutGetStatesSize,libcudnn),cudnnStatus_t,(Ptr{Nothing},Ptr{Csize_t}),handle(),s) @check ccall((:cudnnDropoutGetStatesSize,libcudnn),cudnnStatus_t,(Ptr{Nothing},Ptr{Csize_t}),handle(),s)
states = CuArray{UInt8}(undef, s[]) # TODO: can we drop this when ρ=0? states = CuArray{UInt8}(undef, s[]) # TODO: can we drop this when ρ=0?
desc = DropoutDesc(d[], states) desc = DropoutDesc(d[], states)
@check ccall((:cudnnSetDropoutDescriptor,libcudnn),cudnnStatus_t,(Ptr{Nothing},Ptr{Nothing},Cfloat,Ptr{Nothing},Csize_t,Culonglong), @check ccall((:cudnnSetDropoutDescriptor,libcudnn),cudnnStatus_t,(Ptr{Nothing},Ptr{Nothing},Cfloat,CuPtr{Nothing},Csize_t,Culonglong),
desc,handle(),ρ,states,length(states),seed) desc,handle(),ρ,states,length(states),seed)
finalizer(desc) do x finalizer(desc) do x
@check ccall((:cudnnDestroyDropoutDescriptor,libcudnn),cudnnStatus_t,(Ptr{Nothing},),x) @check ccall((:cudnnDestroyDropoutDescriptor,libcudnn),cudnnStatus_t,(Ptr{Nothing},),x)
@ -79,18 +79,18 @@ function cudnnBNForward!(y::CuArray{T}, g::CuArray{T}, b::CuArray{T}, x::CuArray
mean = zeros(CuArray{T}, dims...) mean = zeros(CuArray{T}, dims...)
ivar = ones(CuArray{T}, dims...) ivar = ones(CuArray{T}, dims...)
else else
mean = C_NULL mean = CU_NULL
ivar = C_NULL ivar = CU_NULL
end end
@check ccall((:cudnnBatchNormalizationForwardTraining, libcudnn), cudnnStatus_t, @check ccall((:cudnnBatchNormalizationForwardTraining, libcudnn), cudnnStatus_t,
(cudnnHandle_t,cudnnBatchNormMode_t, (cudnnHandle_t,cudnnBatchNormMode_t,
Ptr{T}, Ptr{T}, Ptr{T}, Ptr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{T}, Ptr{Nothing}, CuPtr{T}, CuPtr{T},
Cdouble, Ptr{T}, Ptr{T}, Cdouble, CuPtr{T}, CuPtr{T},
Cdouble, Ptr{T}, Ptr{T}), Cdouble, CuPtr{T}, CuPtr{T}),
handle(), BATCHNORM_SPATIAL, handle(), BATCHNORM_SPATIAL,
Ref(T(alpha)), Ref(T(beta)), Ref(T(alpha)), Ref(T(beta)),
xd, x, xd, x,
@ -107,10 +107,10 @@ function cudnnBNForward!(y::CuArray{T}, g::CuArray{T}, b::CuArray{T}, x::CuArray
@check ccall((:cudnnBatchNormalizationForwardInference, libcudnn), cudnnStatus_t, @check ccall((:cudnnBatchNormalizationForwardInference, libcudnn), cudnnStatus_t,
(Ptr{cudnnHandle_t},cudnnBatchNormMode_t, (Ptr{cudnnHandle_t},cudnnBatchNormMode_t,
Ptr{T}, Ptr{T}, Ptr{T}, Ptr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{T}, Ptr{Nothing}, CuPtr{T}, CuPtr{T},
Ptr{T}, Ptr{T}, CuPtr{T}, CuPtr{T},
Cdouble), Cdouble),
handle(), BATCHNORM_SPATIAL, handle(), BATCHNORM_SPATIAL,
Ref(T(alpha)), Ref(T(beta)), Ref(T(alpha)), Ref(T(beta)),
@ -159,7 +159,7 @@ function cudnnBNBackward!(dg::CuArray{T}, g::CuArray{T}, db::CuArray{T},
mean, ivar = cache.mean, cache.ivar mean, ivar = cache.mean, cache.ivar
info("mean and ivar are fetched from the cache") info("mean and ivar are fetched from the cache")
else else
mean, ivar = C_NULL, C_NULL mean, ivar = CU_NULL, CU_NULL
end end
if eps < BATCHNORM_MIN_EPS if eps < BATCHNORM_MIN_EPS
@ -170,11 +170,11 @@ function cudnnBNBackward!(dg::CuArray{T}, g::CuArray{T}, db::CuArray{T},
(cudnnHandle_t,cudnnBatchNormMode_t, (cudnnHandle_t,cudnnBatchNormMode_t,
Ptr{T}, Ptr{T}, Ptr{T}, Ptr{T},
Ptr{T}, Ptr{T}, Ptr{T}, Ptr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{T}, Ptr{T}, Ptr{Nothing}, CuPtr{T}, CuPtr{T}, CuPtr{T},
Cdouble, Ptr{T}, Ptr{T}), Cdouble, CuPtr{T}, CuPtr{T}),
handle(), BATCHNORM_SPATIAL, handle(), BATCHNORM_SPATIAL,
Ref(T(alpha)), Ref(T(beta)), Ref(T(alpha)), Ref(T(beta)),
Ref(T(dalpha)), Ref(T(dbeta)), Ref(T(dalpha)), Ref(T(dbeta)),

34
src/cuda/curnn.jl
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@ -101,18 +101,18 @@ function cudnnRNNForward(rnn::RNNDesc{T}, seqlen, xd, x, hd, h, cd, c, wd, w, yd
if reserve == nothing if reserve == nothing
@check ccall((:cudnnRNNForwardInference, libcudnn), cudnnStatus_t, @check ccall((:cudnnRNNForwardInference, libcudnn), cudnnStatus_t,
(Ptr{Nothing}, Ptr{Nothing}, Cint, (Ptr{Nothing}, Ptr{Nothing}, Cint,
Ptr{Ptr{Nothing}}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Ptr{Nothing}}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Ptr{Nothing}}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Ptr{Nothing}}, CuPtr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Csize_t), CuPtr{Nothing}, Csize_t),
handle(), rnn, seqlen, handle(), rnn, seqlen,
xd, x, hd, h, cd, c, wd, w, yd, y, hod, ho, cod, co, xd, x, hd, h, cd, c, wd, w, yd, y, hod, ho, cod, co,
workspace, length(workspace)) workspace, length(workspace))
else else
@check ccall((:cudnnRNNForwardTraining, libcudnn), cudnnStatus_t, @check ccall((:cudnnRNNForwardTraining, libcudnn), cudnnStatus_t,
(Ptr{Nothing}, Ptr{Nothing}, Cint, (Ptr{Nothing}, Ptr{Nothing}, Cint,
Ptr{Ptr{Nothing}}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Ptr{Nothing}}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Ptr{Nothing}}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Ptr{Nothing}}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Csize_t, Ptr{Nothing}, Csize_t), CuPtr{Nothing}, Csize_t, CuPtr{Nothing}, Csize_t),
handle(), rnn, seqlen, handle(), rnn, seqlen,
xd, x, hd, h, cd, c, wd, w, yd, y, hod, ho, cod, co, xd, x, hd, h, cd, c, wd, w, yd, y, hod, ho, cod, co,
workspace, length(workspace), reserve, length(reserve)) workspace, length(workspace), reserve, length(reserve))
@ -121,7 +121,7 @@ end
xDesc(x) = [TensorDesc(eltype(x), (1, size(x, 1), size(x, 2)))] xDesc(x) = [TensorDesc(eltype(x), (1, size(x, 1), size(x, 2)))]
hDesc(h::Nothing) = C_NULL, C_NULL hDesc(h::Nothing) = C_NULL, CU_NULL
hDesc(x::Integer) = (@assert x == 0; hDesc(nothing)) hDesc(x::Integer) = (@assert x == 0; hDesc(nothing))
function hDesc(h::CuArray) function hDesc(h::CuArray)
TensorDesc(eltype(h), (size(h, 1), size(h, 2), 1)), h TensorDesc(eltype(h), (size(h, 1), size(h, 2), 1)), h
@ -169,10 +169,10 @@ function cudnnRNNBackwardData(rnn::RNNDesc{T}, seqlen, yd, y, dyd, dy, dhod, dho
wd, w, hd, h, cd, c, dxd, dx, dhd, dh, dcd, dc, ws, rs) where T wd, w, hd, h, cd, c, dxd, dx, dhd, dh, dcd, dc, ws, rs) where T
@check ccall((:cudnnRNNBackwardData,libcudnn),cudnnStatus_t, @check ccall((:cudnnRNNBackwardData,libcudnn),cudnnStatus_t,
(Ptr{Nothing}, Ptr{Nothing}, Cint, (Ptr{Nothing}, Ptr{Nothing}, Cint,
Ptr{Ptr{Nothing}}, Ptr{T}, Ptr{Ptr{Nothing}}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Ptr{Nothing}}, CuPtr{T}, Ptr{Ptr{Nothing}}, CuPtr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing},
Ptr{T}, Ptr{Ptr{Nothing}}, Ptr{T}, Ptr{Nothing}, Ptr{T}, Ptr{Nothing}, Ptr{T}, CuPtr{T}, Ptr{Ptr{Nothing}}, CuPtr{T}, Ptr{Nothing}, CuPtr{T}, Ptr{Nothing}, CuPtr{T},
Ptr{Nothing}, Csize_t, Ptr{Nothing}, Csize_t), CuPtr{Nothing}, Csize_t, CuPtr{Nothing}, Csize_t),
handle(), rnn, seqlen, yd, y, dyd, dy, dhod, dho, dcod, dco, handle(), rnn, seqlen, yd, y, dyd, dy, dhod, dho, dcod, dco,
wd, w, hd, h, cd, c, dxd, dx, dhd, dh, dcd, dc, ws, length(ws), rs, length(rs)) wd, w, hd, h, cd, c, dxd, dx, dhd, dh, dcd, dc, ws, length(ws), rs, length(rs))
end end
@ -199,12 +199,12 @@ function cudnnRNNBackwardWeights(rnn::RNNDesc{T}, seqlen, xd, x, hd, h, yd, y, d
workspace, reserve) where T workspace, reserve) where T
@check ccall((:cudnnRNNBackwardWeights,libcudnn), cudnnStatus_t, @check ccall((:cudnnRNNBackwardWeights,libcudnn), cudnnStatus_t,
(Ptr{Nothing}, Ptr{Nothing}, Cint, # handle, rnnDesc, seqLength (Ptr{Nothing}, Ptr{Nothing}, Cint, # handle, rnnDesc, seqLength
Ptr{Ptr{Nothing}}, Ptr{T}, #x Ptr{Ptr{Nothing}}, CuPtr{T}, #x
Ptr{Nothing}, Ptr{T}, #hx Ptr{Nothing}, CuPtr{T}, #hx
Ptr{Ptr{Nothing}}, Ptr{T}, #y Ptr{Ptr{Nothing}}, CuPtr{T}, #y
Ptr{Nothing}, Csize_t, #ws CuPtr{Nothing}, Csize_t, #ws
Ptr{Nothing}, Ptr{T}, #dw Ptr{Nothing}, CuPtr{T}, #dw
Ptr{Nothing}, Csize_t), #rs CuPtr{Nothing}, Csize_t), #rs
handle(), rnn, seqlen, xd, x, hd, h, yd, y, handle(), rnn, seqlen, xd, x, hd, h, yd, y,
workspace, length(workspace), dwd, dw, reserve, length(reserve)) workspace, length(workspace), dwd, dw, reserve, length(reserve))
end end

3
src/data/Data.jl
View File

@ -39,4 +39,7 @@ include("tree.jl")
include("sentiment.jl") include("sentiment.jl")
using .Sentiment using .Sentiment
include("iris.jl")
export Iris
end end

88
src/data/iris.jl Normal file
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@ -0,0 +1,88 @@
"""
Iris
Fisher's classic iris dataset.
Measurements from 3 different species of iris: setosa, versicolor and
virginica. There are 50 examples of each species.
There are 4 measurements for each example: sepal length, sepal width, petal
length and petal width. The measurements are in centimeters.
The module retrieves the data from the [UCI Machine Learning Repository](https://archive.ics.uci.edu/ml/datasets/iris).
"""
module Iris
using DelimitedFiles
using ..Data: deps, download_and_verify
const cache_prefix = ""
# Uncomment if the iris.data file is cached to cache.julialang.org.
# const cache_prefix = "https://cache.julialang.org/"
function load()
isfile(deps("iris.data")) && return
@info "Downloading iris dataset."
download_and_verify("$(cache_prefix)https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data",
deps("iris.data"),
"6f608b71a7317216319b4d27b4d9bc84e6abd734eda7872b71a458569e2656c0")
end
"""
labels()
Get the labels of the iris dataset, a 150 element array of strings listing the
species of each example.
```jldoctest
julia> labels = Flux.Data.Iris.labels();
julia> summary(labels)
"150-element Array{String,1}"
julia> labels[1]
"Iris-setosa"
```
"""
function labels()
load()
iris = readdlm(deps("iris.data"), ',')
Vector{String}(iris[1:end, end])
end
"""
features()
Get the features of the iris dataset. This is a 4x150 matrix of Float64
elements. It has a row for each feature (sepal length, sepal width,
petal length, petal width) and a column for each example.
```jldoctest
julia> features = Flux.Data.Iris.features();
julia> summary(features)
"4×150 Array{Float64,2}"
julia> features[:, 1]
4-element Array{Float64,1}:
5.1
3.5
1.4
0.2
```
"""
function features()
load()
iris = readdlm(deps("iris.data"), ',')
Matrix{Float64}(iris[1:end, 1:4]')
end
end

58
src/layers/basic.jl
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@ -88,6 +88,14 @@ function Base.show(io::IO, l::Dense)
print(io, ")") print(io, ")")
end end
# Try to avoid hitting generic matmul in some simple cases
# Base's matmul is so slow that it's worth the extra conversion to hit BLAS
(a::Dense{<:Any,W})(x::AbstractArray{T}) where {T <: Union{Float32,Float64}, W <: AbstractArray{T}} =
invoke(a, Tuple{AbstractArray}, x)
(a::Dense{<:Any,W})(x::AbstractArray{<:Real}) where {T <: Union{Float32,Float64}, W <: AbstractArray{T}} =
a(T.(x))
""" """
Diagonal(in::Integer) Diagonal(in::Integer)
@ -117,10 +125,48 @@ function Base.show(io::IO, l::Diagonal)
print(io, "Diagonal(", length(l.α), ")") print(io, "Diagonal(", length(l.α), ")")
end end
# Try to avoid hitting generic matmul in some simple cases
# Base's matmul is so slow that it's worth the extra conversion to hit BLAS
(a::Dense{<:Any,W})(x::AbstractArray{T}) where {T <: Union{Float32,Float64}, W <: AbstractArray{T}} =
invoke(a, Tuple{AbstractArray}, x)
(a::Dense{<:Any,W})(x::AbstractArray{<:Real}) where {T <: Union{Float32,Float64}, W <: AbstractArray{T}} = """
a(T.(x)) Maxout(over)
`Maxout` is a neural network layer, which has a number of internal layers,
which all have the same input, and the maxout returns the elementwise maximium
of the internal layers' outputs.
Maxout over linear dense layers satisfies the univeral approximation theorem.
Reference:
Ian J. Goodfellow, David Warde-Farley, Mehdi Mirza, Aaron Courville, and Yoshua Bengio.
2013. Maxout networks.
In Proceedings of the 30th International Conference on International Conference on Machine Learning - Volume 28 (ICML'13),
Sanjoy Dasgupta and David McAllester (Eds.), Vol. 28. JMLR.org III-1319-III-1327.
https://arxiv.org/pdf/1302.4389.pdf
"""
struct Maxout{FS<:Tuple}
over::FS
end
"""
Maxout(f, n_alts)
Constructs a Maxout layer over `n_alts` instances of the layer given by `f`.
The function takes no arguement and should return some callable layer.
Conventionally this is a linear dense layer.
For example the following example which
will construct a `Maxout` layer over 4 internal dense linear layers,
each identical in structure (784 inputs, 128 outputs).
```julia
insize = 784
outsie = 128
Maxout(()->Dense(insize, outsize), 4)
```
"""
function Maxout(f, n_alts)
over = Tuple(f() for _ in 1:n_alts)
return Maxout(over)
end
function (mo::Maxout)(input::AbstractArray)
mapreduce(f -> f(input), (acc, out) -> max.(acc, out), mo.over)
end

6
test/data.jl
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@ -14,3 +14,9 @@ using Test
@test FashionMNIST.labels() isa Vector{Int64} @test FashionMNIST.labels() isa Vector{Int64}
@test Data.Sentiment.train() isa Vector{Data.Tree{Any}} @test Data.Sentiment.train() isa Vector{Data.Tree{Any}}
@test Iris.features() isa Matrix
@test size(Iris.features()) == (4,150)
@test Iris.labels() isa Vector{String}
@test size(Iris.labels()) == (150,)

24
test/layers/basic.jl
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@ -30,4 +30,28 @@ using Test, Random
@test Flux.Diagonal(2)([1,2]) == [1,2] @test Flux.Diagonal(2)([1,2]) == [1,2]
@test Flux.Diagonal(2)([1 2; 3 4]) == [1 2; 3 4] @test Flux.Diagonal(2)([1 2; 3 4]) == [1 2; 3 4]
end end
@testset "Maxout" begin
# Note that the normal common usage of Maxout is as per the docstring
# These are abnormal constructors used for testing purposes
@testset "Constructor" begin
mo = Maxout(() -> identity, 4)
input = rand(40)
@test mo(input) == input
end
@testset "simple alternatives" begin
mo = Maxout((x -> x, x -> 2x, x -> 0.5x))
input = rand(40)
@test mo(input) == 2*input
end
@testset "complex alternatives" begin
mo = Maxout((x -> [0.5; 0.1]*x, x -> [0.2; 0.7]*x))
input = [3.0 2.0]
target = [0.5, 0.7].*input
@test mo(input) == target
end
end
end end