Is there a way I can combine multiple spectrogram subplots (or multiple channel spectrograms) into just one spectrogram?

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Philip Masters 2021-5-8

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https://ww2.mathworks.cn/matlabcentral/answers/825200-is-there-a-way-i-can-combine-multiple-spectrogram-subplots-or-multiple-channel-spectrograms-into-j

评论： Mathieu NOE 2021-5-10

I have multiple chirp signals each with different frequencies e.g. the first chirp goes from 0 to 100 Hz, second from 50 to 200 Hz and the third goes from 25 - 350 Hz. All of these use the same sampling rate and last the same amount of time.

Both MATLAB's spectrogram function and Simulink's Spectrum Analyzer allow you to have multiple channels and signal inputs but it allows you to view one channel at a time.

Is there any way of combining these spectrograms so that I have different frequency and magnitude levels in the same time duration? I read about vector averaging but I feel like I'll be back in the same place in that the new spectrogram will have different frequency values but I'll still end up with a spectrogram that is max magnitude where the frequency occurs and minimum everywhere else like this one: