N = 1024;
n = 0:N-1;
w0 = 2*pi/5;
x = sin(w0*n)+10*sin(2*w0*n);
Executing the spectrogram function with an output does not create a spectrogram.
s = spectrogram(x);
Running the function without the output opens up a figure window with a spectrogram.
spectrogram(x)
If you want this spectrogram to appear in your app, you could place it in a panel and the created figure window as such:
fig = figure;
spectrogram(x,'yaxis')
h = gca;
h.Parent = app.Panel;
delete(fig)
For an example, please see the app attached.
