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.

h?=?X?*?theta;
J?=?（h?-?y）‘*（h?-?y）/（2?*?m）;
%?J?=?sum（（h?-?y）.^2）/（2?*?m）;

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

end

?屬性????????????大小?????日期????時間???名稱
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?????目錄???????????0??2018-10-16?14:19??machine-learning\
?????文件????????8196??2018-10-25?18:47??machine-learning\.DS_Store
?????目錄???????????0??2018-10-31?14:28??__MACOSX\
?????目錄???????????0??2018-10-31?14:28??__MACOSX\machine-learning\
?????文件?????????120??2018-10-25?18:47??__MACOSX\machine-learning\._.DS_Store
?????目錄???????????0??2018-10-02?15:34??machine-learning\machine-learning-ex4\
?????文件????????6148??2018-10-05?14:17??machine-learning\machine-learning-ex4\.DS_Store
?????目錄???????????0??2018-10-31?14:28??__MACOSX\machine-learning\machine-learning-ex4\
?????文件?????????120??2018-10-05?14:17??__MACOSX\machine-learning\machine-learning-ex4\._.DS_Store
?????文件??????356692??2017-03-13?18:40??machine-learning\machine-learning-ex4\ex4.pdf
?????文件?????????268??2017-03-13?18:40??__MACOSX\machine-learning\machine-learning-ex4\._ex4.pdf
?????目錄???????????0??2018-10-19?10:00??machine-learning\machine-learning-ex4\ex4\
?????文件????????1502??2017-03-13?18:40??machine-learning\machine-learning-ex4\ex4\displayData.m
?????目錄???????????0??2018-10-31?14:28??__MACOSX\machine-learning\machine-learning-ex4\ex4\
?????文件?????????212??2017-03-13?18:40??__MACOSX\machine-learning\machine-learning-ex4\ex4\._displayData.m
?????文件????????1067??2018-10-03?16:18??machine-learning\machine-learning-ex4\ex4\randInitializeWeights.m
?????文件?????????268??2018-10-03?16:18??__MACOSX\machine-learning\machine-learning-ex4\ex4\._randInitializeWeights.m
?????文件?????????137??2017-03-13?18:40??machine-learning\machine-learning-ex4\ex4\sigmoid.m
?????文件?????????212??2017-03-13?18:40??__MACOSX\machine-learning\machine-learning-ex4\ex4\._sigmoid.m
?????文件?????7511764??2017-03-13?18:40??machine-learning\machine-learning-ex4\ex4\ex4data1.mat
?????文件?????????212??2017-03-13?18:40??__MACOSX\machine-learning\machine-learning-ex4\ex4\._ex4data1.mat
?????文件?????????263??2018-10-03?19:49??machine-learning\machine-learning-ex4\ex4\token.mat
?????文件?????????700??2018-10-03?16:02??machine-learning\machine-learning-ex4\ex4\sigmoidGradient.m
?????文件?????????212??2018-10-03?16:02??__MACOSX\machine-learning\machine-learning-ex4\ex4\._sigmoidGradient.m
?????文件?????????841??2017-03-13?18:40??machine-learning\machine-learning-ex4\ex4\debugInitializeWeights.m
?????文件?????????268??2017-03-13?18:40??__MACOSX\machine-learning\machine-learning-ex4\ex4\._debugInitializeWeights.m
?????文件????????5001??2018-10-19?10:00??machine-learning\machine-learning-ex4\ex4\nnCostFunction.m
?????文件?????????384??2018-10-19?10:00??__MACOSX\machine-learning\machine-learning-ex4\ex4\._nnCostFunction.m
?????文件????????1095??2017-03-13?18:40??machine-learning\machine-learning-ex4\ex4\computeNumericalGradient.m
?????文件?????????268??2017-03-13?18:40??__MACOSX\machine-learning\machine-learning-ex4\ex4\._computeNumericalGradient.m
?????文件????????8749??2017-03-13?18:40??machine-learning\machine-learning-ex4\ex4\fmincg.m
............此處省略580個文件信息