Machine Learning week 4 ex3 program 錯誤整理未完待續

第一次時在填寫 lrCostFunction.m時  A = X * theta;J = -1/m * (y' * log(sigmoid(A)) + (1 - y')* log(1-sigmoid(A))); grad = 1/m * X' * (log(sigmoid(A) - y)); temp = theta; temp(1) = 0; J = J + lambda / (2*m) * (

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