transpose函数python,函数可微说明什么

1、不加参数的情况下，transpose()的作用就是整个矩阵完全置换

import numpy as npA = np.arange(24).reshape(2,3,4)T = A.transpose()print(T.shape)print('______________')print(A)print('______________')print(T)print('______________')print(A[1,2,3])print(T[3,2,1])

output：

(4, 3, 2)______________[[[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11]] [[12 13 14 15] [16 17 18 19] [20 21 22 23]]]______________[[[ 0 12] [ 4 16] [ 8 20]] [[ 1 13] [ 5 17] [ 9 21]] [[ 2 14] [ 6 18] [10 22]] [[ 3 15] [ 7 19] [11 23]]]______________2323

2、加参数时，必须根据矩阵的维度来设置参数

import numpy as np#对于该矩阵可以认为有三个维度，即0,1,2A = np.arange(24).reshape((2,3,4))print(A)#如果不改变原矩阵，那么正常的参数顺序是：(0,1,2)T = A.transpose(0,1,2)print(T)print('_____________________')#如果想要置换第1和第2个维度，则参数顺序为：(1, 0 ,2)T = A.transpose(1,0,2)print(A[0,1,2])print(T[1,0,2])print('_____________________')#如果要置换第1和第3个维度，则参数的顺序为：(2,1,0)T = A.transpose(2,1,0)print(A[0,1,2])print(T[2,1,0])

output：

[[[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11]] [[12 13 14 15] [16 17 18 19] [20 21 22 23]]][[[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11]] [[12 13 14 15] [16 17 18 19] [20 21 22 23]]]_____________________66_____________________66