MATLAB: How to make a variable in one .m file make changes in another .m file

image processingMATLABvariables

Hi, I change the variable of one .m file and want that this number be automatically rewritten for another variable in another .m file.

For example, I open the file:

open cpcorr.m;

and change the value in line 76 as below:

CORRSIZE = 4;

Now I have a new newfile.m with the variable

CS=CORRSIZE;

Thus, when I change the value of CORRSIZE in cpcorr.m, I wish also that the value of CS in file1.m be automatically changed, for this particular example, CS would equal 4.

I hope someone knows how to fix this.

Thanks in advance for your help

Emerson

Best Answer

You can't do it if all you do is to change the text in the m-file. After all, an m-file is stored simply as a flat text file on disk. One text file sitting there on disk is not going to know that it needs to change itself if some other file somewhere on disk changed itself. However if you run the m-file, then you can put code in it to change the variable value in the other m-file. Look at the assignin() function.

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MATLAB: Use variables of one .m file in another .m file

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save('myfile.mat','name_var1','name_var1')

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load('myfile.mat')

MATLAB: How to update the variable of a function using a dialogbox

Try the (while) loop with simple criterion, as:

    clear all; close all;
    prompt          =   {'CORRELATION SIZE:'};
    dlg_title       =   'SHIFTED PIXEL';
    def             =   {'5'};
    CORRSIZE        =   5; % Here. Or any initial value, see below why
    while (CORRSIZE); % Here.
    answer          =   inputdlg(prompt,dlg_title,[1 20],def);
    CORRSIZE        =   str2num(answer{1,1}); %#ok<ST2NM>
    if CORRSIZE==0; % Here. When you input ZERO it will stop.
        break % Here
    end % Here. To end the endless loop
    base_points_0   =   [56  37];
    input_points_0  =   [56  37];
    imagea          =   imread('1.bmp');
    imageb          =   imread('2.bmp');
    image1          =   rgb2gray(imagea);
    image2          =   rgb2gray(imageb);
    d               =   zeros(1,2,2);
    d(:,:,1)        =   base_points_0;
    [input_points, base_points] = cpselect(image2,image1, input_points_0, base_points_0,'Wait', true);
    updated_inputs  =   cpcorr(input_points, base_points, image2, image1);
    d(:,:,2)        =   updated_inputs;
    end % Here. End of while loop

Please notice that I added the lines ending with ( %Here ). Perhaps it works now as required.

Best Answer

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MATLAB: Use variables of one .m file in another .m file

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