function?J?=?computeCost（X?y?theta）
%COMPUTECOST?Compute?cost?for?linear?regression
%???J?=?COMPUTECOST（X?y?theta）?computes?the?cost?of?using?theta?as?the
%???parameter?for?linear?regression?to?fit?the?data?points?in?X?and?y

%?Initialize?some?useful?values
m?=?length（y）;?%?number?of?training?examples

%?You?need?to?return?the?following?variables?correctly?
J?=?0;

%?======================?YOUR?CODE?HERE?======================
%?Instructions:?Compute?the?cost?of?a?particular?choice?of?theta
%???????????????You?should?set?J?to?the?cost.

????
S=?y?-?X*theta;

for?i?=?1:m
????J?=?J+S（i）.*S（i）;
end
J?=?J/（2*m）;
%?=========================================================================

end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????701??2016-12-17?14:37??machine-learning-ex1\ex1\computeCost.m

?????文件????????735??2016-12-17?15:27??machine-learning-ex1\ex1\computeCostMulti.m

?????文件???????3438??2016-12-16?11:36??machine-learning-ex1\ex1\ex1.m

?????文件???????1359??2016-12-16?11:36??machine-learning-ex1\ex1\ex1data1.txt

?????文件????????657??2016-12-16?11:36??machine-learning-ex1\ex1\ex1data2.txt

?????文件???????4460??2016-12-16?11:36??machine-learning-ex1\ex1\ex1_multi.m

?????文件???????1441??2016-12-17?15:52??machine-learning-ex1\ex1\featureNormalize.m

?????文件???????1108??2016-12-17?15:21??machine-learning-ex1\ex1\gradientDescent.m

?????文件???????1133??2016-12-17?15:24??machine-learning-ex1\ex1\gradientDescentMulti.m

?????文件???????1624??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\AUTHORS.txt

?????文件???????3862??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\ChangeLog.txt

?????文件????????881??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\jsonopt.m

?????文件???????1551??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\LICENSE_BSD.txt

?????文件??????18732??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\loadjson.m

?????文件??????15574??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\loadubjson.m

?????文件????????771??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\mergestruct.m

?????文件??????19369??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\README.txt

?????文件??????17462??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\savejson.m

?????文件??????16123??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\saveubjson.m

?????文件???????1094??2016-12-16?11:36??machine-learning-ex1\ex1\lib\jsonlab\varargin2struct.m

?????文件???????1195??2016-12-16?11:36??machine-learning-ex1\ex1\lib\makeValidFieldName.m

?????文件???????3734??2016-12-16?11:36??machine-learning-ex1\ex1\lib\submitWithConfiguration.m

?????文件????????672??2016-12-17?15:57??machine-learning-ex1\ex1\normalEqn.m

?????文件????????910??2016-12-17?14:28??machine-learning-ex1\ex1\plotData.m

?????文件???????1876??2016-12-16?11:36??machine-learning-ex1\ex1\submit.m

?????文件????????265??2016-12-17?15:57??machine-learning-ex1\ex1\token.mat

?????文件????????520??2016-12-17?14:22??machine-learning-ex1\ex1\warmUpExercise.m

?????文件?????489928??2016-12-16?11:36??machine-learning-ex1\ex1.pdf

?????文件???????1192??2016-12-18?20:52??machine-learning-ex2\ex2\costFunction.m

?????文件???????1330??2016-12-19?11:11??machine-learning-ex2\ex2\costFunctionReg.m

............此處省略254個文件信息