function?J=cost（Xytheta）
m=size（X1）;
pridiction=X*theta;
sqr=（pridiction-y）.^2;
J=1/（2*m）*sum（sqr）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????106??2017-11-23?09:43??cost.m

?????文件?????????26??2017-11-26?22:04??read?me.txt

?????文件????????670??2017-11-23?17:46??machine-learning-ex1\machine-learning-ex1\ex1\computeCost.m

?????文件????????699??2017-11-24?17:35??machine-learning-ex1\machine-learning-ex1\ex1\computeCostMulti.m

?????文件???????3908??2017-11-23?15:51??machine-learning-ex1\machine-learning-ex1\ex1\ex1.m

?????文件???????1359??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\ex1data1.txt

?????文件????????657??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\ex1data2.txt

?????文件???????4858??2017-11-24?21:39??machine-learning-ex1\machine-learning-ex1\ex1\ex1_multi.m

?????文件???????1356??2017-11-24?17:39??machine-learning-ex1\machine-learning-ex1\ex1\featureNormalize.m

?????文件???????1337??2017-11-23?18:12??machine-learning-ex1\machine-learning-ex1\ex1\gradientDescent.m

?????文件???????1027??2017-11-24?20:46??machine-learning-ex1\machine-learning-ex1\ex1\gradientDescentMulti.m

?????文件???????1624??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\AUTHORS.txt

?????文件???????3862??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\ChangeLog.txt

?????文件????????881??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\jsonopt.m

?????文件???????1551??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\LICENSE_BSD.txt

?????文件??????18732??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\loadjson.m

?????文件??????15574??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\loadubjson.m

?????文件????????771??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\mergestruct.m

?????文件??????19369??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\README.txt

?????文件??????17462??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\savejson.m

?????文件??????16123??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\saveubjson.m

?????文件???????1094??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\jsonlab\varargin2struct.m

?????文件???????1195??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\makeValidFieldName.m

?????文件???????5562??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\lib\submitWithConfiguration.m

?????文件????????668??2017-11-24?21:16??machine-learning-ex1\machine-learning-ex1\ex1\normalEqn.m

?????文件????????982??2017-11-23?15:29??machine-learning-ex1\machine-learning-ex1\ex1\plotData.m

?????文件???????1876??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1\submit.m

?????文件????????262??2017-11-24?21:18??machine-learning-ex1\machine-learning-ex1\ex1\token.mat

?????文件????????513??2017-11-23?11:26??machine-learning-ex1\machine-learning-ex1\ex1\warmUpExercise.m

?????文件?????489928??2017-03-13?18:40??machine-learning-ex1\machine-learning-ex1\ex1.pdf

............此處省略9個文件信息