Path: news.mathworks.com!newsfeed-00.mathworks.com!news.kjsl.com!newsfeed.stanford.edu!newsfeed.news.ucla.edu!nrc-news.nrc.ca!newsflash.concordia.ca!canopus.cc.umanitoba.ca!not-for-mail
From: roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson)
Newsgroups: comp.soft-sys.matlab
Subject: Re: fft, frequecy of a signal
Date: Tue, 17 Jun 2008 11:41:05 +0000 (UTC)
Organization: National Research Council Canada - Conseil national de rechereches Canada
Lines: 18
Message-ID: <g387sh$48v$1@canopus.cc.umanitoba.ca>
References: <g355te$q0r$1@fred.mathworks.com> <zvJ5k.12906$Ri.2282@flpi146.ffdc.sbc.com> <g37quk$et6$1@fred.mathworks.com>
NNTP-Posting-Host: origin.ibd.nrc.ca
X-Trace: canopus.cc.umanitoba.ca 1213702865 4383 192.70.172.160 (17 Jun 2008 11:41:05 GMT)
X-Complaints-To: abuse@cc.umanitoba.ca
NNTP-Posting-Date: Tue, 17 Jun 2008 11:41:05 +0000 (UTC)
Originator: roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson)
Xref: news.mathworks.com comp.soft-sys.matlab:474206



In article <g37quk$et6$1@fred.mathworks.com>,
muzaffar  <muzaffarbashir@yahoo.com> wrote:
>"Nasser Abbasi" <nma@12000.org> wrote in message 
><zvJ5k.12906$Ri.2282@flpi146.ffdc.sbc.com>...
>> "muzaffar " <muzaffarbashir@yahoo.com> wrote in message 
>> news:g355te$q0r$1@fred.mathworks.com...

>> > How can i find out its frequency?

>I know length of the signal, total time

Standard definition of frequency: samples per second.
So divide the number of samples (the length) by the total time.
(Provided, that is, that the signal was sampled at regular
intervals.)
-- 
  "Prevention is the daughter of intelligence."
                                              -- Sir Walter Raleigh