How to get spectrogram data to align with signal data

Question

Zjuv9021 2021-4-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/798987-how-to-get-spectrogram-data-to-align-with-signal-data

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

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Srivardhan Gadila 2021-4-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/798987-how-to-get-spectrogram-data-to-align-with-signal-data#answer_683865

在 MATLAB Online 中打开

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;