GUI load file.mat and use it

Hi,

I am creating a GUI and need to use data from m.file. It's working for the first file, but not or the second. Both are (double). Any idea?

matrice_losses.mat is load, but not MM...

Regards

[Adam]

What happens? Nothing? An error? Incorrect results? If you get an error please post the error message.

[MartinM]

Sorry I forget it

Error using load
Attempt to add "mm" to a static workspace.
 See Variables in Nested and Anonymous Functions.

Error in GUI_Code/PushB (line XX)
                  load MM;
 
Error while evaluating UIControl Callback.

mm is the name on the variable wich should be used

[Adam]

Given that error I'm surprised the first matfile loads. A nested function does give you this static workspace that you can't add variables to, as far as I am aware (certainly when I put breakpoints in these files and try to create variables on command line I can't). If you don't use nested functions that particular error would go away, but again, I don't really understand how it doesn't also give that error for your first file, without running the code.

[Jakob B. Nielsen]

It is possible that you can load matrice_losses because you subsequently "do something" to it, either inside your function or elsewhere in the code. That means it is a nested variable within your GUI workspace (I dont know the correct terms, sorry ;)

MM, however, is just loaded and done nothing with. Try initializing MM outside the function, or calling it from another function in the GUI.

I'm just spitballing here. If one thing can load, another should be able to, and this is the only difference I can see out of what you posted.

[Stephen23]

Bad code practices strike again!

You can easily avoid this error by loading into an output variable (which you should be doing anyway), e.g.:

S = load('matrice_losses.mat');
lamfit = S.matrice_losses(:,1).*1e-3;
lossdB = S.matrice_losses(:,2);

Answer 1

[Jose Jeremias Caballero]

    function  PushB(hObject,eventdata,handles)
        load matrice_losses
        lamfit=(matrice_losses(:,1).*1e-3)
        lossdB =matrice_losses(:,2);
        
        u=load('MM.mat')
        mm=u.mm
    end