Machine learning linear regression (V): linear regression equation solver

import numpy as np

X = np.array([[3,3.2],\
              [3.5,3.6]])
X

y = np.array([[118.4],\
          [135.2]])
y

Matrix equation solving

#转置
XT = X.T
XT

#方阵
XTX = np.dot(XT,X)
XTX

#逆矩阵
INV = np.linalg.inv(XTX)
INV

# 继续
A =np.dot(np.dot(INV,XT),y)
A

#验证
np.dot(X,A)