How can I randomly shuffle columns in my matrix

For example, if I have

1 5 9 13 17

2 6 10 14 18

3 7 11 15 19

4 8 12 16 20

I want to have a function that can shuffle the columns around while keeping the values in the column the same. For example:

1 9 13 5 17

2 10 14 6 18

3 11 15 7 19

4 12 16 8 20

The columns have been randomly rearranged.

Answer 1

[Walter Roberson]

randperm() the number of columns and use the result as the column indices

A(:, randperm(size(A, 2)))

[Allen Ye]

Thank you so much!