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Add cost function for regularized logistic regression

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neingeist 2014-10-15 10:10:30 +02:00
parent 224a17e4d3
commit f391ac661e
1 changed files with 4 additions and 6 deletions
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ex2/costFunctionReg.m
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@ -17,10 +17,8 @@ grad = zeros(size(theta));
% Compute the partial derivatives and set grad to the partial % Compute the partial derivatives and set grad to the partial
% derivatives of the cost w.r.t. each parameter in theta % derivatives of the cost w.r.t. each parameter in theta
J = 1/m * (-y'*log(sigmoid(X*theta)) - (1-y)'*log(1-sigmoid(X*theta))) ...
+ lambda/(2*m) * theta(2:end)' * theta(2:end);
% ============================================================= % =============================================================