How to get spectrogram data to align with signal data

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Zjuv9021
Zjuv9021 2021-4-11
回答： Srivardhan Gadila 2021-4-24
I am attempting to align the time variables of the spectrogram of a signal and it's correpsonding time points in the time domain, and as you can see, we are a bit lagging behind in the time domain (bottom subplot) because of the reduced width from the spectrogram.
Is there a way I can adjust the subplot(2,1,2) to cleverly align with where the time = 60 is on the spectrogram? Right now, I'm simply using subplot function.
Thank you,
Zach

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Srivardhan Gadila
Srivardhan Gadila 2021-4-24
You can make use of the Position and the XLim properties of the axes. Refer to the documentation of Axes Properties for more information.
N = 1024;
n = 0:N-1;
w0 = 2*pi/5;
x = sin(w0*n)+10*sin(2*w0*n);
s = spectrogram(x);
f1 = subplot(2,1,1);
spectrogram(x,'yaxis');
f1WidthHeight = f1.Position(3:4);
f2 = subplot(2,1,2);
plot(x);
%Set same width and Xlimits for the second subplot
f2.Position(3:4) = f1WidthHeight;
f2.XLim = f1.XLim;

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