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??2017-10-10?08:09??mlclass-ex1-jin10.23\
?????文件?????????695??2017-10-10?08:08??mlclass-ex1-jin10.23\computeCost.m
?????文件?????????711??2017-10-10?08:08??mlclass-ex1-jin10.23\computeCostMulti.m
?????文件????????3438??2017-10-10?08:08??mlclass-ex1-jin10.23\ex1.m
?????文件????????1359??2017-10-10?08:08??mlclass-ex1-jin10.23\ex1data1.txt
?????文件?????????657??2017-10-10?08:08??mlclass-ex1-jin10.23\ex1data2.txt
?????文件????????4484??2017-10-10?08:08??mlclass-ex1-jin10.23\ex1_multi.m
?????文件????????1474??2017-10-10?08:08??mlclass-ex1-jin10.23\featureNormalize.m
?????文件????????1172??2017-10-10?08:08??mlclass-ex1-jin10.23\gradientDescent.m
?????文件?????????979??2017-10-10?08:08??mlclass-ex1-jin10.23\gradientDescentMulti.m
?????文件?????????262??2017-10-10?08:08??mlclass-ex1-jin10.23\ml_login_data.mat
?????文件?????????677??2017-10-10?08:08??mlclass-ex1-jin10.23\normalEqn.m
?????文件???????????0??2017-10-10?08:08??mlclass-ex1-jin10.23\OGLdpf.log
?????文件????????1051??2017-10-10?08:08??mlclass-ex1-jin10.23\plotData.m
?????文件???????15590??2017-10-10?08:08??mlclass-ex1-jin10.23\submit.m
?????文件???????10724??2017-10-10?08:08??mlclass-ex1-jin10.23\submitWeb.m
?????文件?????????520??2017-10-10?08:08??mlclass-ex1-jin10.23\warmUpExercise.m
?????目錄???????????0??2017-10-10?08:09??mlclass-ex2-jin\
?????文件????????1045??2017-10-10?08:08??mlclass-ex2-jin\costFunction.m
?????文件????????1172??2017-10-10?08:08??mlclass-ex2-jin\costFunctionReg.m
?????文件????????3741??2017-10-10?08:08??mlclass-ex2-jin\ex2.m
?????文件??????192780??2017-10-10?08:08??mlclass-ex2-jin\ex2.pdf
?????文件????????3775??2017-10-10?08:08??mlclass-ex2-jin\ex2data1.txt
?????文件????????2233??2017-10-10?08:08??mlclass-ex2-jin\ex2data2.txt
?????文件????????2973??2017-10-10?08:08??mlclass-ex2-jin\ex2_reg.m
?????文件?????????508??2017-10-10?08:08??mlclass-ex2-jin\mapFeature.m
?????文件????????1007??2017-10-10?08:08??mlclass-ex2-jin\plotData.m
?????文件????????1451??2017-10-10?08:08??mlclass-ex2-jin\plotDecisionBoundary.m
?????文件?????????842??2017-10-10?08:08??mlclass-ex2-jin\predict.m
?????文件?????????451??2017-10-10?08:08??mlclass-ex2-jin\sigmoid.m
?????文件???????17086??2017-10-10?08:08??mlclass-ex2-jin\submit.m
............此處省略120個文件信息