Numpy 矩阵。I 功能| Python
原文:https://www . geeksforgeeks . org/numpy-matrix-I-function-python/
借助 numpy.matrix.I() 函数，我们可以得到与给定矩阵相同大小的乘法逆。
语法: numpy.matrix.I()
返回:【矩阵对象】如果 self 非奇异，ret 是这样的:ret * self = = self * ret = = NP . matrix(NP . eye(self[0，])。大小)都返回真。返回给定矩阵的乘法逆。
代码#1 :
# Python program explaining
# numpy.matrix.I() function
# importing numpy as geek
import numpy as geek
mat = geek.matrix('[3, 4; 5, 6]')
# applying matrix.getI() method
gfg = mat.getI()
print(gfg)
输出:
[[-3\. 2\. ]
[ 2.5 -1.5]]
代码#2 :
# Python program explaining
# numpy.matrix.I() function
# importing numpy as geek
import numpy as geek
mat = geek.matrix('[1, 2, 3; 4, 5, 6; 7, 8, 9]')
# applying matrix.getI() method
gfg = mat.getI()
print(gfg)
输出:
[[ -4.50359963e+15 9.00719925e+15 -4.50359963e+15]
[ 9.00719925e+15 -1.80143985e+16 9.00719925e+15]
[ -4.50359963e+15 9.00719925e+15 -4.50359963e+15]]
