Find max value using parfor loop

I have very complex, time-consuming computation function depends on three parameters. I decided to use parfor loop and I have the following situation

best_result = methodcall(init1, init2, init3);
for x1=1:init1
  for x2=1:init2
    parfor x3=1:init3
      a = methodcall(x1,x2,x3);
      if (a > best_result)
        best_result = a;
      end
    end
  end
end

And of course -

The temporary variable 'best_result' uses a value set outside the PARFOR.

I cannot define an 3d array (init1, init2, init3) because there are very big numbers. What I have to do, to solve it?

Answer 1

[Walter Roberson]

best_result = methodcall(init1, init2, init3);
for x1=1:init1
  for x2=1:init2
    a = zeros(init3, 1);
    parfor x3=1:init3
      a(x3) = methodcall(x1,x2,x3);
    end
    best_result = max(best_result, max(a));
  end
end

Note: your heading talks about finding the max value, but your proposed code would find the min value. I have coded here for max value; change the two max() to min() if you want min.