문제
How to create an application allowing to display a 3D representation of a wave file withtime, amplitude and frequency (3d spectrogram) in matlab. NOTE:The ready function of matlab or any other library related with the spectogram are not allowed
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다른 팁
I think that what you are looking for is a spectrogram:
http://www.mathworks.com/help/toolbox/signal/ref/spectrogram.html
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