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Re: Spectrogram of signal


From: Peter L. Soendergaard
Subject: Re: Spectrogram of signal
Date: Thu, 30 Aug 2012 16:42:31 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0

On 2012-08-30 15:12, Rick T wrote:
Greetings All

I'm trying to test the specgram function located in the signal package in octave but I'm a little confused at the variables in specgram.  What I would like to do is be able to get the specgram data into an array that will show the frequency and the length of time when the frequency starts and stops
You must use the 'stft' (short-time Fourier transform) function instead. The specgram function is intended primarely for plotting.

<plug> or use the 'dgtreal' function from LTFAT. There is a description here: http://ltfat.sourceforge.net/doc/gabor/dgtreal.php . Actually, the stft function in Octave does almost the same, even the order of the parameters is almost the same, so learn from both pieces of documentation. </plug>

Cheers,
Peter.



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