Path: news.mathworks.com!newsfeed-00.mathworks.com!newsfeed2.dallas1.level3.net!news.level3.com!postnews.google.com!t13g2000yqt.googlegroups.com!not-for-mail
From: "Steven G. Johnson" <stevenj@alum.mit.edu>
Newsgroups: comp.soft-sys.matlab
Subject: Re: FFT and DFT in matlab
Date: Wed, 5 Aug 2009 15:39:54 -0700 (PDT)
Organization: http://groups.google.com
Lines: 13
Message-ID: <5d217906-c5db-4cc7-97bf-ef26c62e04a2@t13g2000yqt.googlegroups.com>
References: <32904364.31308.1240942509387.JavaMail.jakarta@nitrogen.mathforum.org> 
	<h5c7nj$6ba$1@fred.mathworks.com>
NNTP-Posting-Host: 18.87.1.222
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1249511994 18568 127.0.0.1 (5 Aug 2009 22:39:54 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Wed, 5 Aug 2009 22:39:54 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: t13g2000yqt.googlegroups.com; posting-host=18.87.1.222; 
	posting-account=8NDTcgkAAAAJi7VTMeoxFq45ivECWdQM
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; 
	rv:1.9.0.13) Gecko/2009073021 Firefox/3.0.13,gzip(gfe),gzip(gfe)
Xref: news.mathworks.com comp.soft-sys.matlab:561167


On Aug 5, 11:16 am, "Haroun Youssef" <aga...@yahoo.com> wrote:
> Matlab is using FFT not DFT, so it is considering that the samples are unifrom.

An FFT is an algorithm for computing the DFT (the name of the abstract
mathematical transformation, not a specific method to compute this
transformation).

It would be more accurate to say that a transform with non-equispaced
data is not a DFT.

Regards,
Steven G. Johnson