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From: "Vincenzo Manzoni" <ervincio@tiscali.it>
Newsgroups: comp.soft-sys.matlab
Subject: PSD and sptool
Date: Sat, 4 Aug 2007 13:39:46 +0000 (UTC)
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Hi,

I am working with sptool for analyze the PSD (Power Spectral
Density) of signals.

Now, I need to implement the code to do the analysis in
automatic manner. 

This is the code (x contains the time serie):

y = fft(y, 2048);
Pyy = y * conj(y);

Now, I have searched how to calculare normalization factor
(to render plot of my Pyy the same of sptool), but I haven't
found nothing.

Could you help me?