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.
J?=?sum（（X?*?theta?-?y）.^2）?/?（2*m）;?????%?X（792）??theta（21）




%?=========================================================================

end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-10-15?15:38??ML_MATLAB\
?????目錄???????????0??2017-10-15?15:37??ML_MATLAB\machine-learning-ex1\
?????目錄???????????0??2017-10-15?15:37??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\
?????目錄???????????0??2017-10-15?15:37??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\
?????文件?????????694??2017-09-27?10:08??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\computeCost.m
?????文件?????????708??2017-09-27?10:09??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\computeCostMulti.m
?????文件????????3909??2017-10-15?13:21??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\ex1.m
?????文件????????1359??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\ex1data1.txt
?????文件?????????657??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\ex1data2.txt
?????文件????????4538??2017-09-28?09:13??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\ex1_multi.m
?????文件????????1398??2017-09-27?10:12??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\featureNormalize.m
?????文件????????1081??2017-09-27?10:22??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\gradientDescent.m
?????文件?????????983??2017-09-27?10:13??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\gradientDescentMulti.m
?????目錄???????????0??2017-10-15?15:37??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\
?????目錄???????????0??2017-10-15?15:37??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\
?????文件????????1624??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\AUTHORS.txt
?????文件????????3862??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\ChangeLog.txt
?????文件?????????881??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\jsonopt.m
?????文件????????1551??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\LICENSE_BSD.txt
?????文件???????18732??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\loadjson.m
?????文件???????15574??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\loadubjson.m
?????文件?????????771??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\mergestruct.m
?????文件???????19369??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\README.txt
?????文件???????17462??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\savejson.m
?????文件???????16123??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\saveubjson.m
?????文件????????1094??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\varargin2struct.m
?????文件????????1195??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\makeValidFieldName.m
?????文件????????5562??2017-03-13?18:40??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\lib\submitWithConfiguration.m
?????文件?????????677??2017-09-27?10:14??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\normalEqn.m
?????文件????????1050??2017-09-27?16:24??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\plotData.m
?????文件????????1876??2017-09-27?10:07??ML_MATLAB\machine-learning-ex1\machine-learning-ex1\ex1\submit.m
............此處省略253個文件信息