Parallel Iterations of all the elements in an array.

I want to iterate all the elements independently (same condition for all elements though). I want to stop the iteration when the value stops changing. I will post the part of my code. According to some research, I figured that it can also be done using parfor loop but i don't know how to implement it. Can anyone please correct my code? Thanks in Advance.

probability = (ones(1,2048) .* 1/2048);
Tij = sum(StateTransitionfwd); %gives us an array of 2048 elements.
probability = ((probability * StateTransitionbwd) - (Tij .* probability));
threshold = (ones(1,2048) .* 0.05);
old = zeros(1,2048);
new = zeros(1,2048);

while(1)
    probability = ((probability * StateTransitionbwd) - (Tij .* probability));
    new = probability;

      if old-new <= threshold

          break
      end
      old = probability;
  end

So basically I want the steady state probability (where it is not changing anymore)