MATLAB: Problem with Undefined variable or class

antipatterncallbackevalinMATLABstructundefined variable

Matlab can't see defined struct variable. And I inform you that i had connection with Robot in that time. I apologize for so many posts from me i'm not that good at programming. P1 = rpoint(kwadrat_zolty.Centroid_x*kalibracja,kwadrat_zolty.Centroid_y*kalibracja,-15.600,0,0,0,'signal',[9,-10],'pulse',[1 0.5],'wait',5); % pobranie

If someone don't know what is rpoint I wrote about it here: https://www.mathworks.com/matlabcentral/answers/378570-how-to-get-data-values-from-struct-and-save-it-in-struct?s_tid=prof_contriblnk

Best Answer

The variable exists in your workspace, but the error is telling you that in the callback function it does not exist. Functions have their own workspace and if you don't pass them the variables explicitly they can't access them.

Without seeing the callback code and the line where you call that callback it's difficult to tell you how to fix it.

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MATLAB: How to use Struct Array in a function

In the place you need the structure, use

in = evalin('base', 'in') ;

MATLAB: How to load a variable into the workspace not as a structure into a GUI

Remember, that the remote controlled creation of variables in another workspace is a bad programming style. I would avoid this strictly, but store the data inside the figure and use it from there.

But if you really want to do this:

asset = 'XYZ';
Data  = load('XYZ.mat');
assignin('base', asset, Data.(asset));

Best Answer

Related Solutions

MATLAB: How to use Struct Array in a function

MATLAB: How to load a variable into the workspace not as a structure into a GUI

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