How do I save each iteration of a loop into a matrix?

This is my code; the problem is when I use a loop for circular shifts, I need each iteration to be saved into a matrix so I can concantenate it with two other matrices and take out duplicates

% This script will calculate the number of possible arrangements for a
% necklace given a certain number of beads assuming circular shifts and
% flips are the same
 
%Create a vector with the beads where a number is assigned to each color
v=[1 1 2 2 3 4];
% 1=red
% 2=blue
% 3=yellow
% 4=green
 
% Determine total number of beads and all possible permutations
n=numel(v);
p=perms(v);
 
% Take into account colors with >1 beads
p2=unique(perms(v),'rows');
 
% Generate flips of all permutations
f=fliplr(p2);
 
% Generate circular shifts for all permutations
for i=0:n
    c=circshift(p, [0, i]);
end
 
% Combine the three matrices into one and remove duplicate rows
combined=[p2;f;c];
final=unique(combined,'rows');
 
configurations=size(final,1);
fprintf('The number of possible configurations is %d\n',configurations)

Answer 1

[per isakson]

Replace

for i=0:n
    c=circshift(p, [0, i]);
end

by

c = nans(n,1);
for i=0:n
    c(i)=circshift(p, [0, i]);
end

[SammyJoe]

This gives this error:

Undefined function or variable 'nans'.

Error in configurebeads1 (line 23)

c = nans(n,1);

[per isakson]

My fault, the name of the function is nan

Then there is another problem. The Matlab arrays are one-based.

Thus

c = nan(n+1,1);
for i=0:n
    c(i+1)=circshift(p, [0, i]);
end