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Compute the gradient for logistic regression

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neingeist 2014-10-14 07:46:10 +02:00
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commit 31c4ac1967
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ex2/costFunction.m
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@ -21,7 +21,7 @@ grad = zeros(size(theta));
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J = 1/m * (-y'*log(sigmoid(X*theta)) - (1-y)'*log(1-sigmoid(X*theta)));
grad = 1/m * X' * (sigmoid(X*theta) - y);