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.
for?i?=?1:m
????J?=?J+（X（i:）*theta-y（i））^2;
end
J?=?J/（2*m）;

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

end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-08-11?18:52??coursera‘s?machine?learning?answer\
?????目錄???????????0??2015-08-11?18:51??coursera‘s?machine?learning?answer\machine-learning-ex1\
?????目錄???????????0??2015-08-11?18:51??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\
?????文件?????????690??2015-04-16?08:26??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\computeCost.m
?????文件?????????728??2015-04-18?14:56??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\computeCostMulti.m
?????文件????????3438??2015-04-18?09:55??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\ex1.m
?????文件????????4476??2015-04-18?15:21??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\ex1_multi.m
?????文件????????1358??2015-04-16?07:34??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\ex1data1.txt
?????文件?????????657??2013-11-07?14:43??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\ex1data2.txt
?????文件????????1568??2015-04-18?10:38??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\featureNormalize.m
?????文件????????1126??2015-04-18?15:01??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\gradientDescent.m
?????文件????????1265??2015-04-18?15:05??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\gradientDescentMulti.m
?????目錄???????????0??2015-08-11?18:51??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\
?????目錄???????????0??2015-08-11?18:51??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\
?????文件????????1624??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\AUTHORS.txt
?????文件????????3862??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\ChangeLog.txt
?????文件????????1551??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\LICENSE_BSD.txt
?????文件???????19369??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\README.txt
?????文件?????????881??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\jsonopt.m
?????文件???????18732??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\loadjson.m
?????文件???????15574??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\loadubjson.m
?????文件?????????771??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\mergestruct.m
?????文件???????17462??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\savejson.m
?????文件???????16123??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\saveubjson.m
?????文件????????1094??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\jsonlab\varargin2struct.m
?????文件????????1195??2015-02-26?23:12??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\makeValidFieldName.m
?????文件????????3734??2015-04-02?16:05??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\lib\submitWithConfiguration.m
?????文件?????????669??2015-04-18?15:31??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\normalEqn.m
?????文件?????????977??2015-04-16?07:49??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\plotData.m
?????文件????????1882??2015-04-16?07:33??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\submit.m
?????文件?????????258??2015-08-01?11:16??coursera‘s?machine?learning?answer\machine-learning-ex1\ex1\token.mat
............此處省略249個文件信息