多變量的線性迴歸（梯度下降，Python語言，MATLAB語言）

Python版： import numpy as np import matplotlib.pyplot as plt a = np.loadtxt('ex1data2.txt') print(a.shape) X=a[:,0:2] y=a[:,2:3] m=y.shape[0] l=X.shape[1] print(m,l) X0=np.ones(m) def featureNormalize(

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