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@ -20,8 +20,7 @@ grad = zeros(size(theta));
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J = 1/m * (-y'*log(sigmoid(X*theta)) - (1-y)'*log(1-sigmoid(X*theta))) ...
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+ lambda/(2*m) * theta(2:end)' * theta(2:end);
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regularization_term = ...
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lambda/m * (theta .* prepad(ones(length(theta)-1, 1), length(theta), 0));
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regularization_term = lambda/m * vertcat([0], theta(2:end));
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grad = 1/m * X' * (sigmoid(X*theta) - y) + regularization_term;
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% =============================================================
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