How do I make a function out of my for loop?

I have a main file with a for loop that computes a value based on a variable that is initialized in the same file above the for loop.

stick = [totalRun totalCrash];
[ROWS,COL] = size(stick);
total = sum(stick);
normalizedStick = stick/total;
selections = zeros(1,NUM_TRIALS);

for trial=1:1:NUM_TRIALS,

      sel = rand(1);

      lowerBound = 0;
      upperBound = 0;
      value = -1;

      for b=1:1:COL,
          lowerBound = upperBound;
          upperBound = upperBound + normalizedStick(b);
          if ((sel >= lowerBound) && (sel < upperBound))
              value = b;
              break;
          end
      end
  end

How can I turn this into a function that takes the stick variable (which is an integer array of 2 numbers) and outputs the variable value?

[James Tursa]

What about NUM_TRIALS? Is that to be passed into the function as well? Or is it only the code inside the "trial" loop that you want in a function?

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/matlab/matlab_prog/nested-functions.html

This will require that you turn the outer layer into a function as well.

Starting from R2016b you can have functions in scripts but they are not nested functions and do not have shared variable access.

You could, though, redefine your calling interface so that it passes in all values needed by the function.