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martinthenext/gist:1343532

Created November 6, 2011 21:33
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gistfile1.txt
J = 1 / m * (sum(-1 * y .* log(sigmoid(X * theta)) - (1 - y) .* log(sigmoid(X * theta)))) + lambda / (2 * m) * sum(theta(2:length(theta),:));
grad = 1 / m * X' * (sigmoid(X * theta) - y);
temp = theta;
temp(1) = 0;
grad = grad + (lambda / m) * temp;
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