spectrogram function: phase and magnitude

2014 11 20
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更新时间：2014 11 21
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Hi,
I read the Spectrogram function and I sort of understand it, but I have a question. As stated in the definition, the Spectrogram returns the Short-time Fourier Transform of the input signal. When I take a STFT, I must get two components: magnitude and phase. I assume that the magnitude vector is what we get from the Spectrogram, but what about the phase? Please help!!!!
Thanks

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Rick Rosson
Rick Rosson 2014-11-21

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The spectrogram function returns complex numbers, which include both magnitude and phase information.
[S,F,T] = spectrogram(...);
A = abs(S);
phi = angle(S);

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