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Re: Problems with FFT and IFFT
From: |
John W. Eaton |
Subject: |
Re: Problems with FFT and IFFT |
Date: |
Tue, 28 Feb 2006 11:48:49 -0500 |
On 28-Feb-2006, Keith Goodman wrote:
| Here's what I get (no imaginary part; I get the same result in 2.1.72):
|
| $ octave
| Octave 2.9.4 Forge 20050613
| >> fs = 0:0.1:10;
| >> x = sin(2*pi*fs);
| >> real(x)
What kind of hardware? I see imaginary parts, but all less than eps.
Perhaps due to extra internal precision of amd64/x86 floating point
hardware? Also, I am using fftw, are you? Try
octave_config_info ("FFTW_LIBS")
to see.
In any case, while it might be nice to understand where the
differences are coming from, I don't think this is a bug.
jwe
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- Problems with FFT and IFFT, Sascha Berkenkamp, 2006/02/28
- Re: Problems with FFT and IFFT, Keith Goodman, 2006/02/28
- Re: Problems with FFT and IFFT, Keith Goodman, 2006/02/28
- Re: Problems with FFT and IFFT,
John W. Eaton <=
- Re: Problems with FFT and IFFT, Dmitri A. Sergatskov, 2006/02/28
- Re: Problems with FFT and IFFT, Sascha Berkenkamp, 2006/02/28
- Re: Problems with FFT and IFFT, John W. Eaton, 2006/02/28
- Re: Problems with FFT and IFFT, Joe Koski, 2006/02/28
- Re: Problems with FFT and IFFT, Quentin Spencer, 2006/02/28
- Re: Problems with FFT and IFFT, Joe Koski, 2006/02/28
- Re: Problems with FFT and IFFT, Bill Denney, 2006/02/28
- Re: Problems with FFT and IFFT, Steve C. Thompson, 2006/02/28
- RE: Problems with FFT and IFFT, Frank Palazzolo, 2006/02/28
Re: Problems with FFT and IFFT, Joe Koski, 2006/02/28