Another way instead of for loop

I have this code

 for i = 1:34
    for j = 1:i  % <-- Note the 1:i instead of 1:n
     s(i,j) = abs(z(i,ind(j))-z(j,ind(i)))/(z(i,ind(j))+z(j,ind(i)));
     s(j,i) = s(i,j)
    end
 end

but it is very slow, so i want another way instead of for loop.

[Christiaan]

Dear Muhammad, What would you like to acchieve? Kind regards

[muhammad ismat]

i have a matrix 10 x 10

then i make a cluster to previous matrix then i want calculate eq

 (z(i,ind(j))-z(j,ind(i)))/(z(i,ind(j))+z(j,ind(i)))

to each point in the matrix

where ind cluster no that a point belong to, z is the distance from point to a cluster