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

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Tyler Johnson
Tyler Johnson 2016-9-19
回答： Walter Roberson 2016-9-20
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?
  1 个评论
James Tursa
James Tursa 2016-9-20
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?

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回答（1 个）

Walter Roberson
Walter Roberson 2016-9-20
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.

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