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
-----------?---------??----------?-----??----
?????文件?????8498782??2018-07-31?14:54??機器學習個人筆記完整版v5.29-A4打印版.pdf
?????目錄???????????0??2018-11-08?20:07??machine-learning-ex1\
?????目錄???????????0??2018-11-08?20:07??machine-learning-ex1\ex1\
?????文件?????????694??2018-01-11?19:47??machine-learning-ex1\ex1\computeCost.m
?????文件?????????708??2018-01-11?19:47??machine-learning-ex1\ex1\computeCostMulti.m
?????文件????????3909??2018-01-11?19:47??machine-learning-ex1\ex1\ex1.m
?????文件????????4538??2018-01-11?19:47??machine-learning-ex1\ex1\ex1_multi.m
?????文件????????1359??2018-01-11?19:47??machine-learning-ex1\ex1\ex1data1.txt
?????文件?????????657??2018-01-11?19:47??machine-learning-ex1\ex1\ex1data2.txt
?????文件????????1398??2018-01-11?19:47??machine-learning-ex1\ex1\featureNormalize.m
?????文件????????1081??2018-01-11?19:47??machine-learning-ex1\ex1\gradientDescent.m
?????文件?????????983??2018-01-11?19:47??machine-learning-ex1\ex1\gradientDescentMulti.m
?????目錄???????????0??2018-11-08?20:07??machine-learning-ex1\ex1\lib\
?????目錄???????????0??2018-11-08?20:07??machine-learning-ex1\ex1\lib\jsonlab\
?????文件????????1624??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\AUTHORS.txt
?????文件????????3862??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\ChangeLog.txt
?????文件????????1551??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\LICENSE_BSD.txt
?????文件???????19369??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\README.txt
?????文件?????????881??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\jsonopt.m
?????文件???????18732??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\loadjson.m
?????文件???????15574??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\loadubjson.m
?????文件?????????771??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\mergestruct.m
?????文件???????17462??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\savejson.m
?????文件???????16123??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\saveubjson.m
?????文件????????1094??2018-01-11?19:47??machine-learning-ex1\ex1\lib\jsonlab\varargin2struct.m
?????文件????????1195??2018-01-11?19:47??machine-learning-ex1\ex1\lib\makeValidFieldName.m
?????文件????????5562??2018-01-11?19:47??machine-learning-ex1\ex1\lib\submitWithConfiguration.m
?????文件?????????677??2018-01-11?19:47??machine-learning-ex1\ex1\normalEqn.m
?????文件????????1050??2018-01-11?19:47??machine-learning-ex1\ex1\plotData.m
?????文件????????1876??2018-01-11?19:47??machine-learning-ex1\ex1\submit.m
?????文件?????????263??2018-01-11?19:47??machine-learning-ex1\ex1\token.mat
............此處省略263個文件信息