This is a basic MATLAB operation. It is for instructional purposes.
---
If you want to get a random permutation of integers randperm will help.
Given n, put the integers [1 2 3... N] in a random order.
Yes, the test suite is not conclusive, but it is pretty close!
Which values occur exactly three times?
3168 Solvers
2120 Solvers
442 Solvers
877 Solvers
Given a 4x4 matrix, swap the two middle columns
282 Solvers