How to use unique in a conditional statement nested in for loop?

I want to apply "unique" function on sol to get rid of repeated arrays.

n = 10000;
for a = 1:n
   for b = 1:n
       x = a^2-b;
       y = sqrt(a^2+b^2);
       if (mod(x,1)==0) && (mod(y,1)==0)
           sol = [a,b]
       end
   end
end

So, for this code I tried

 soln = unique(sol);
 disp(soln)

But this approach displays only the last result due to loop. How can I fix it?

Answer 1

[Mischa Kim]

Usman, you could do it this way. First compute all solutions in a matrix X and then compute unique values.

n = 1000;
for a = 1:n
   for b = 1:n
       x = a^2-b;
       y = sqrt(a^2+b^2);
       X(b + (a-1)*b,:) = [x y];
   end
end
Y = unique(X,'rows');

[Usman Saleem]

But where do I apply the conditional statement?

[Walter Roberson]

Apply it afterwards.

Note: since your loops are over integers, x = a^2-b; is always an integer and does not need to be checked.

[Usman Saleem]

Yes, but these are dummy functions and will be change by the complex ones. Also, I will try to apply if statement afterwards.