Why for loop inside MATLAB Function Block doesn't work!

Question

Babak 2018-1-15

回答： Walter Roberson 2018-1-15

Hello All,

Why I can not run a simple for loop inside Matlab Function block? My code is as follow:

    function [out,power_kw] = fcn(power)
    power_kw=power/1000;
    for j=1:5
      fuel(j)=j+1; 
    end
    FC_min=min(fuel);
    out =FC_min;

Answer 1

Walter Roberson 2018-1-15

MATLAB Function Block do not allow arrays to grow. You need to initialize fuel() to its final side before you can write individual elements.

fuel = zeros(1,5);

before the loop.

You could also do

fuel = (1:5)+1;

Seems like a waste of time though since you would know which entry is the minimum ahead of time.