Plotting in Matlab appdesigner

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I'm trying to create a random signal generator with stem plot in Matlab App Designer, and when I click the 'Generate' Button - nothing happens. Below is the code I added in the generated code from the app designer.
methods (Access = private)
%generate button is pushed
function GenerateButtonPushed(app, event)
amplitude = app.AmplitudeEditField.Value;
samples = app.SamplesEditField.Value;
n_range1 = app.nRange1EditField.Value;
n_range2 = app.nRange2EditField.Value;
n_range = n_range1:n_range2;
xn = amplitude .* sin(2*pi*randn(1,samples));
%plot random signal
stem(n_range,xn, 'parent', app.UIAxes)
end
end
When I ran this block of code in a live script in Matlab. It worked, but the graph won't show when I run it with the GUI.

Accepted Answer

Mario Malic
Mario Malic on 14 Feb 2021
Edited: Mario Malic on 14 Feb 2021
Hello,
Try this
stem(app.UIAxes, n_range,xn);
Edit: Both of these functions work, actually, the error is in writing a callback manually without assigning it to the component. In App Designer, click the right mouse button on the button component and go to callbacks and add one. Then you paste the body of your code in it.
  7 Comments
Mario Malic
Mario Malic on 14 Feb 2021
Please accept my answer (blue button), thanks in advance.

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More Answers (1)

randerss simil
randerss simil on 14 Feb 2021
Edited: randerss simil on 14 Feb 2021
%if true
function GenerateButtonPushed(app,eventData)
It's eventdata instead of event
  2 Comments
Claudee Khiarra Directo
Claudee Khiarra Directo on 14 Feb 2021
changed it to eventData, and still no stem plot showing up in the GUI

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