[ADD] week three finishing notebook

COVID_data_proc.ipynb

@@ -2153,6 +2153,46 @@
     ")"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "-2:2"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "-2:2"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "21"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "length(-5:.5:5)"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,

Week3_PR_Data.dat

@@ -0,0 +1,15 @@
+.1268004831284406	-1.6416953879765301
+.5013092807380928	-.9776975375269383
+1.5280121125586477	.5277112203195138
+1.7001225303407743	1.711524991194374
+1.9924936253216172	1.8910000148140624
+2.706075824201991	-.46342779446395
+2.9949319274309043	-.4435666186385725
+3.4918528112833935	-1.275179133203867
+3.501191722475427	-.6904995966451337
+4.459924502120439	-5.51613079927097
+4.936965850879389	-6.001703074115855
+5.023289852369695	-8.364169009651015
+5.042336980089736	-7.924477516763416
+5.507392850419521	-10.774823709545498
+5.568665171088307	-10.917187797703853