Creating a row vector where the index of the vector is not equal to its element value

I am working on a problem and i have an idea of how to do most of it but i am not sure how to do its last part. Any help would be appreciated. I am highlighting the part that i am talking about. The statement for the question is as follows:

Write a function called int_col that has one input argument, a positive integer n that is greater than 1, and one output argument v that is a column vector of length n containing all the positive integers smaller than or equal to n, arranged in such a way that no element of the vector equals its own index. In other words, v(k) is not equal to k for any valid index k.*

Answer 1

[Andrei Bobrov]

function v = int_col(n)
v = randperm(n)';
t = v == (1:n)';
if any(t)
    ii = [find(~t,1,'first');find(t)];
    v(circshift(ii,1)) = v(ii);
end

Answer 2

[Stephen23]

Because your question does not state anywhere that the output needs to be random, then the answer can be quite simple: just shift all of the values by one place. You can use circshift for this:

>> int_col = @(n) circshift((1:n)',-1);
>> V = int_col(5)
V =
     2
     3
     4
     5
     1
>> V(1)
ans =
     2
>> V(2)
ans =
     3
>> V(5)
ans =
     1

[Andrei Bobrov]

circshift((1:n)',randi([1,n-1]))