如何在矩阵中插入'n'列

Question

假设我有以下矩阵

A = diag(5)
A
     [,1] [,2] [,3] [,4] [,5]
[1,]    1    0    0    0    0
[2,]    0    1    0    0    0
[3,]    0    0    1    0    0
[4,]    0    0    0    1    0
[5,]    0    0    0    0    1

，我想在A中添加矩阵new_A的第一列（n次，假设n = 3，但在我的情况下，{{ 1}}可以更大）

n

如何在new_A [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [1,] 1 1 1 1 0 0 0 0 [2,] 0 0 0 0 1 0 0 0 [3,] 0 0 0 0 0 1 0 0 [4,] 0 0 0 0 0 0 1 0 [5,] 0 0 0 0 0 0 0 1 中自动添加A的{​​{1}}的第一列？

Answer 1

重复1 class PostAdmin(admin.ModelAdmin): readonly_fields = ['image_tag'] list_display = ['designer','image_tag'] 次，然后追加其余的列。

n