Creating Matrix with a Dynamic Size

Hello,

I can create 2*2 matrix with the following code but for higher dimension I can not:

function [A,B] = CHSH2d(d)
    A=zeros(d,d,2,d);
    B=A;
    projectors_of_sigma_x = [1/sqrt(2)*[1;1],1/sqrt(2)*[1;-1]];
    if d==2
          A(:,:,1,k) = projectors_of_sigma_x(:,k)*transpose(projectors_of_sigma_x(:,k));
          A(:,:,2,k) = projectors_of_sigma_z(:,k)*transpose(projectors_of_sigma_z(:,k));
    else      
          A(:,:,1,1)=repmat(projectors_of_sigma_x(1)*transpose(projectors_of_sigma_x(1)),d,d); %this line is ok
          A(:,:,1,2)=repmat(projectors_of_sigma_x(2)*transpose(projectors_of_sigma_x(2)),d,d); %In this line I am seeing the same result with A(:,:,1,1)
    end      
end

In the result of A(:,:,1,2) I am seeing the same result with A(:,:,1,1) but I should not!

Answer 1

[Gözde Üstün]

Ok I solved the problem:

for l=1:2
          A(:,:,1,k) = repmat(projectors_of_sigma_x(:,l)*transpose(projectors_of_sigma_x(:,l)),d/2,d/2); 
          A(:,:,2,k) = repmat(projectors_of_sigma_z(:,l)*transpose(projectors_of_sigma_z(:,l)),d/2,d/2);
end