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How to get spectrogram data to align with signal data

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Zjuv9021
Zjuv9021 2021년 4월 11일
답변: Srivardhan Gadila 2021년 4월 24일
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 2021년 4월 24일
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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