MATLAB: How to pass a variable between a m-file and another m-file that runs a gui

guiguidem-filem-file guimatlab gui

Hello,

I'm trying to pass a variable between one m-file and another m-file that initiates gui.

More specifically:

I have one m-file (mfile1) that is concerned with the initiation of gui, however, some calculations are made in other m-file(mfile2).

I would like to pass some variables in the mfile2 to the mfile1.

Is it possible?

Thank you in advance.

Best Answer

M files can contain scripts or functions but variables can only be passed to functions so the m-file must be written as a function [see Scripts vs Functions and Create Function in Files].

For example,

mfile2

function [output] = mfile2(input) 
    % add 1 to the input and pass the result to mfile2.
    y = input + 1; 
    
    % Send y to mfile1 and get the result
    % mfile1 divides y by 2 to z equals (input+1)/2
    z = mfile1(y);
   
end

mfile1

function [output] = mfile1(input)
    % divide the input by two
    output = input/2;
end

All variables needed in a function must either be passed into the function as inputs or defined within the function. If your functions interact with your GUI, pass the handle structure into the function.