import numpy as np def linear_regression_gradient_descent(X, y, alpha, iterations): # 补全代码 m, n = X.shape theta = np.zeros((n,1)) # 包括截距项 theta_0 for _ in range(iterations): predictions = X.dot(theta) errors = predictions - y gradient = X.T.dot(errors) / m theta -= alpha * gradient return np.round(t...