吴恩达机器学习编程题

吴恩达机器学习编程题

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

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件   35993725  2018-07-30 10:22  练习\Ang Machine Learning.rar

     文件        695  2017-10-10 08:08  练习\mlclass-ex1-jin\computeCost.m

     文件        711  2017-10-10 08:08  练习\mlclass-ex1-jin\computeCostMulti.m

     文件       3805  2018-08-03 11:27  练习\mlclass-ex1-jin\ex1.m

     文件       1359  2017-10-10 08:08  练习\mlclass-ex1-jin\ex1data1.txt

     文件        657  2017-10-10 08:08  练习\mlclass-ex1-jin\ex1data2.txt

     文件       4485  2018-05-06 11:19  练习\mlclass-ex1-jin\ex1_multi.m

     文件       1474  2018-05-06 10:27  练习\mlclass-ex1-jin\featureNormalize.m

     文件       1173  2018-08-03 10:37  练习\mlclass-ex1-jin\gradientDescent.m

     文件        979  2017-10-10 08:08  练习\mlclass-ex1-jin\gradientDescentMulti.m

     文件        253  2018-08-03 22:07  练习\mlclass-ex1-jin\hello.mat

     文件        253  2018-08-03 22:08  练习\mlclass-ex1-jin\hello.txt

     文件        162  2018-08-03 22:10  练习\mlclass-ex1-jin\hello1.txt

     文件        180  2018-08-03 22:11  练习\mlclass-ex1-jin\hello2.txt

     文件        222  2018-05-01 11:32  练习\mlclass-ex1-jin\ml_login_data.mat

     文件        677  2017-10-10 08:08  练习\mlclass-ex1-jin\normalEqn.m

     文件          0  2017-10-10 08:08  练习\mlclass-ex1-jin\OGLdpf.log

     文件       1051  2018-08-02 20:50  练习\mlclass-ex1-jin\plotData.m

     文件      15590  2017-10-10 08:08  练习\mlclass-ex1-jin\submit.m

     文件      10724  2017-10-10 08:08  练习\mlclass-ex1-jin\submitWeb.m

     文件        520  2017-10-10 08:08  练习\mlclass-ex1-jin\warmUpExercise.m

     文件       1045  2017-10-10 08:08  练习\mlclass-ex2-jin\costFunction.m

     文件       1163  2018-05-25 17:07  练习\mlclass-ex2-jin\costFunctionReg.m

     文件       3745  2018-08-06 20:13  练习\mlclass-ex2-jin\ex2.m

     文件     192780  2017-10-10 08:08  练习\mlclass-ex2-jin\ex2.pdf

     文件       3775  2017-10-10 08:08  练习\mlclass-ex2-jin\ex2data1.txt

     文件       2233  2017-10-10 08:08  练习\mlclass-ex2-jin\ex2data2.txt

     文件       2975  2018-05-26 22:06  练习\mlclass-ex2-jin\ex2_reg.m

     文件        508  2018-05-25 18:38  练习\mlclass-ex2-jin\mapFeature.m

     文件       1152  2018-08-06 22:08  练习\mlclass-ex2-jin\plotData.m

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