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Re: Does your machine also FFT like mine?


From: Bryce Gardner
Subject: Re: Does your machine also FFT like mine?
Date: Mon, 11 May 1998 11:32:07 -0400 (EDT)

> On my Linux/586 machine, I get
>  
> > ifft(fft([1 1 0 0 1]))
> ans =
>     1.0000e+00    1.0000e+00   -1.4682e-08   -1.4682e-08    1.0000e+00
>  
> This is only single precision accurate.  Unfortunately the other


On my machine (Sparc 10, solaris 2.4) and with Octave 2.0.9,
I get:

echos{bgard}41: octave
Octave, version 2.0.9 (sparc-sun-solaris2.4).
Copyright (C) 1996, 1997 John W. Eaton.
This is free software with ABSOLUTELY NO WARRANTY.
For details, type `warranty'.
 
octave:1> ifft(fft([1 1 0 0 1]))
ans =
 
   1.0000e+00   1.0000e+00   7.3275e-16   7.3275e-16   1.0000e+00
 
octave:2>

So I get double precision accuracy on my version of Octave.
My version is not the lastest (it is more recent then my printed
version of the manual which is version 1.0 Feb 1994).

Bryce

Bryce Gardner
address@hidden



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