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?=?1/（2*m）*sum（（X*theta-y）.^2）;


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

end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-01-01?19:12??機器學習-線性回歸\
?????目錄???????????0??2016-01-01?19:13??機器學習-線性回歸\ex1\
?????文件??????489928??2015-03-11?11:48??機器學習-線性回歸\ex1.pdf
?????文件?????????662??2015-12-31?16:37??機器學習-線性回歸\ex1\computeCost.m
?????文件?????????708??2015-12-31?17:29??機器學習-線性回歸\ex1\computeCostMulti.m
?????文件????????3438??2013-11-08?06:43??機器學習-線性回歸\ex1\ex1.m
?????文件????????1359??2013-11-08?06:43??機器學習-線性回歸\ex1\ex1data1.txt
?????文件?????????657??2013-11-08?06:43??機器學習-線性回歸\ex1\ex1data2.txt
?????文件????????5092??2015-12-31?21:21??機器學習-線性回歸\ex1\ex1_multi.m
?????文件????????1342??2015-12-31?20:57??機器學習-線性回歸\ex1\featureNormalize.m
?????文件?????????943??2015-12-31?16:33??機器學習-線性回歸\ex1\gradientDescent.m
?????文件?????????970??2015-12-31?17:27??機器學習-線性回歸\ex1\gradientDescentMulti.m
?????文件?????????668??2015-12-31?17:52??機器學習-線性回歸\ex1\normalEqn.m
?????文件????????1031??2016-01-01?10:24??機器學習-線性回歸\ex1\plotData.m
?????文件?????????513??2015-12-31?16:46??機器學習-線性回歸\ex1\warmUpExercise.m