Re: Discrete Fourier Transform
- To: mathgroup at smc.vnet.net
- Subject: [mg43867] Re: Discrete Fourier Transform
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 9 Oct 2003 01:54:53 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <bm0juq$prl$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, you sample is assumed to be always equdistant on the interval [0,2Pi) in a discrete Fourier transform. You frequency resolution is the same as the time resolution (for complex signals) ... Regards Jens Katie Neish wrote: > > Hello everyone, > > I am attempting to perform a discrete Fourier transform on a time series > using Mathematica 4.0. (I'd like to determine the period of the signal.) > Unfortunately, I noticed that I cannot control the frequency resolution of > this transform. I also have no idea what units the frequency is in. > > Do you know of any way to get around the problem? > > Thanks so much. > > Catherine Neish