Can anyone tell me what is wrong with my script?

N = input('boardsize ');
NQ = 0;
X = zeros(N);
X(sub2ind([N,N], 1:N, randperm(N, N))) = 1;
while(NQ<N)
for i = 1:N
  for j = 1:N
      if(X(i,j) == 1)
         X(:,j) = 8;
         X(i,j) = 1;           
     end
 end
end

X0=logical(X);
[i,j]=find(X0);
 [ii,jj]=ndgrid(1:N);
 X=reshape(ismember(ii(:)-jj(:),i-j) + ismember(ii(:)+jj(:),i+j),N,N);
 X(X>0)=8;
 X(X0)=1;

index = find([X] == 1);
NQ = numel(index);
end
disp(X)

>> Queens
boardsize 8
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1

The output prints out all 1's when I really want to have an array with N amount of 1's where N is the boardsize NxN. As well as 8's in places that are attacked diagonally and horizontally. I know the individual loops work to "attack the spaces from where the ones are found in the array but together I think my while loop messes it all up. anyone know what I wrong?

[KSSV]

Why don't you show us what out put you are expecting....

[Stephen23]

See identical question:

https://www.mathworks.com/matlabcentral/answers/357066-can-i-assign-values-to-an-array-in-a-diagonal-direction-from-a-reference-point-on-that-array