clear; clc;
A = cell(10,1);
B = num2cell([1 2 3]);
for x = 1 : numel(A)
idk = mod(x,3);
if idk == 0
idk = 3;
end
A{x} = B{idk};
end
The result :
>> A
A =
[1]
[2]
[3]
[1]
[2]
[3]
[1]
[2]
[3]
[1]
