使用 SciPy 库查找方阵的逆矩阵
SciPy库有scipy.求方阵逆的函数。让我们了解如何使用此函数来计算矩阵的逆-linalg.inv()
示例
2x2矩阵的逆矩阵
#Importing the scipy package import scipy.linalg #Importing the numpy package import numpy as np #Declaring the numpy array (Square Matrix) A = np.array([[3, 3.5],[3.2, 3.6]]) #Passing the values to scipy.linalg.inv() function M = scipy.linalg.inv(A) #Printing the result print('Inverse of \n{} \n is {}'.format(A,M))输出结果
Inverse of [[3. 3.5] [3.2 3.6]] is [[-9. 8.75] [ 8. -7.5 ]]
示例
3x3矩阵的逆矩阵
import scipy import numpy as np A = np.array([[2,1,-2],[1,0,0],[0,1,0]]) M = scipy.linalg.inv(A) print('Inverse of \n{} \n is {}'.format(A,M))输出结果
Inverse of [[ 2 1 -2] [ 1 0 0] [ 0 1 0]] is [[ 0. 1. 0. ] [ 0. -0. 1. ] [-0.5 1. 0.5]]