return np.mean(np.abs(pred-true)) def MSE(pred, true): return np.mean((pred-true)**2) def RMSE(pred, true): return np.sqrt(MSE(pred, true)) def MAPE(pred, true): return np.mean(np.abs((pred - true) / true)) def MSPE(pred, true): return np.mean(np.square((pred - tru...