評價指標（純手寫）

RubyTsui發表於2024-07-29
原文網址 : https://www.cnblogs.com/dearmyheart/p/18329878
指標

MSE

MSE = np.sum((y_preditc-y_test)**2)/len(y_test)

RMSE

RMSE = MSE ** 0.5

MAE

MAE = np.sum(np.absolute(y_preditc-y_test))/len(y_test)

R2

SS_res = np.sum((y - y_pred) ** 2)
SS_tot = np.sum((y - np.mean(y)) ** 2)
R2 = 1 - SS_res / SS_tot

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