CODEWITHSUNDEEP
matlab
Yang
Yang

Reputation: 21

How to call a function in a for loop in MATLAB?

I would like to call (execute) an m-file (function) in a loop like this:

global m, r
m = 2;
for n = 2:10;
  for r1 = 0:n-m;
    r2 = n-m-r1;
    r = [r1,r2];   
    [Call the function here?????????]
  end
end

This is the function:

function main
  x0 = [-0.5403,0.5471];
  fsolve(@fcn,x0)

function z = fcn(X)
  rand('twister',5409);
  global m, r
  a = rand(m,1);
  for i = 1:m
    sm(i) = 0.0;
    for l = m-i+1:m
      sm(i) = sm(i)+r(l);
    end
    s = 1.0/(i+sm(i));
    g(i) = (a(i))^s;     
  end
  prod = 1.0;
  for k = 1:m
    prod = prod * g(m+1-k);
    u(k) = 1.0-prod;
    x(k) = (sqrt(3)/pi)*log(u(k)/(1-u(k)));
  end
  sum = 0;
  sum1 = 0;
  sum2 = 0;
  for j = 1:m
    sum = sum+(r(j)+2)*(1/(1+exp((-pi/sqrt(3))*((x(j)-X(1))/X(2)))));
    sum1 = sum1+(r(j)+2)*((x(j)-X(1))/X(2))*(1/(1+exp((-pi/sqrt(3))*((x(j)-X(1))/X(2)))));
    sum2 = sum2+(x(j)-X(1))/X(2);
  end
  z(1) = pi/(X(2)*sqrt(3))*(-m+sum);
  z(2) =(-1/X(2))*(m+(pi/sqrt(3))*(sum2-sum1));

Thank you very much for your help.

Upvotes: 2

Views: 13382

Answers (3)

iancharest
iancharest

Reputation: 63

Personnally I would create your function without a main() part.

create a file called fcn.m with your function fcn in it, make sure it's in your working directory or in your matlab path and then call it inside your loop.

addpath(genpath('/the/path/to/your/function/');
global m, r
m = 2;
for n = 2:10;
  for r1 = 0:n-m;
    r2 = n-m-r1;
    r = [r1,r2];   
    z=fcn(r)
  end
end

Upvotes: 3

gnovice
gnovice

Reputation: 125854

The functions main and fcn should be saved in a file called "main.m". You have to make sure this file is either in your current working directory or somewhere on the MATLAB path (as mentioned in a comment by Amro) so that MATLAB can get to it. Since main requires no input arguments and has no output arguments, you could then just call it in any one of the following ways:

main
main;
main()
main();

Upvotes: 6

MatlabDoug
MatlabDoug

Reputation: 5714

If you have a function Main.m

Main.m

function out = main(in)
% blah blah blah

You would call the function

in = 2;
out = main(in)

Does this make sense?

Upvotes: 3

Related Questions