numpy 矩阵求解 方程求解

目录

• ​​求解思路​​
• ​​代码实现​​

求解 x y z
x + y + z = 8
2x - y + z = 8
3x + y - z = 2

求解思路

​​Xw = Y​​

​​X_inv 点乘 X 点乘 w = X_inv 点乘 Y​​

​​w = X_inv 点乘 Y​​

代码实现

import numpy as np
X = np.array([[1,1,1],[2,-1,1],[3,1,-1]])
w = np.array(['x','y','z'])
Y = np.array([8,8,2])
# 求解逆矩阵
X_inv = np.linalg.inv(X)
np.dot(X_inv,Y)