How to normalized power from spectrogram

Question

Wendy Fernandez 2017-6-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/344834-how-to-normalized-power-from-spectrogram

回答： Vishal Neelagiri 2017-6-22

采纳的回答： Vishal Neelagiri

在 MATLAB Online 中打开

I am using

spectrogram(singal,[],[],[],Fs,'yaxis');colorbar;

command and I would like to normalize the power values obtained in the colorbar. However, I have not seen any way in the documentation to do it. Any suggestions?

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Answer 1

Vishal Neelagiri 2017-6-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/344834-how-to-normalized-power-from-spectrogram#answer_271640

There doesn't seem to be a direct way to normalize the output of the Spectrogram figure. However, you can workaround this by using [~,ps] = spectrogram(singal,[],[],[],Fs,'yaxis'); to extract out the power density values to MATLAB and then normalize the values manually depending on your use-case.