Coursera Machine Learning 第二周编程全套满分题目+注释包括选做optional

Coursera Machine Learning 第二周编程全套满分题目+注释（包括选做optional）

function J=cost（Xytheta）
m=size（X1）;
pridiction=X*theta;
sqr=（pridiction-y）.^2;
J=1/（2*m）*sum（sqr）;

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        106  2017-11-23 09:43  cost.m

     文件         26  2017-11-26 22:04  read me.txt

     文件        670  2017-11-23 17:46  machine-learning-ex1\machine-learning-ex1\ex1\computeCost.m

     文件        699  2017-11-24 17:35  machine-learning-ex1\machine-learning-ex1\ex1\computeCostMulti.m

     文件       3908  2017-11-23 15:51  machine-learning-ex1\machine-learning-ex1\ex1\ex1.m

     文件       1359  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\ex1data1.txt

     文件        657  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\ex1data2.txt

     文件       4858  2017-11-24 21:39  machine-learning-ex1\machine-learning-ex1\ex1\ex1_multi.m

     文件       1356  2017-11-24 17:39  machine-learning-ex1\machine-learning-ex1\ex1\featureNormalize.m

     文件       1337  2017-11-23 18:12  machine-learning-ex1\machine-learning-ex1\ex1\gradientDescent.m

     文件       1027  2017-11-24 20:46  machine-learning-ex1\machine-learning-ex1\ex1\gradientDescentMulti.m

     文件       1624  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\AUTHORS.txt

     文件       3862  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\ChangeLog.txt

     文件        881  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\jsonopt.m

     文件       1551  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\LICENSE_BSD.txt

     文件      18732  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\loadjson.m

     文件      15574  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\loadubjson.m

     文件        771  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\mergestruct.m

     文件      19369  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\README.txt

     文件      17462  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\savejson.m

     文件      16123  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\saveubjson.m

     文件       1094  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\varargin2struct.m

     文件       1195  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\makeValidFieldName.m

     文件       5562  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\lib\submitWithConfiguration.m

     文件        668  2017-11-24 21:16  machine-learning-ex1\machine-learning-ex1\ex1\normalEqn.m

     文件        982  2017-11-23 15:29  machine-learning-ex1\machine-learning-ex1\ex1\plotData.m

     文件       1876  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1\submit.m

     文件        262  2017-11-24 21:18  machine-learning-ex1\machine-learning-ex1\ex1\token.mat

     文件        513  2017-11-23 11:26  machine-learning-ex1\machine-learning-ex1\ex1\warmUpExercise.m

     文件     489928  2017-03-13 18:40  machine-learning-ex1\machine-learning-ex1\ex1.pdf

............此处省略9个文件信息