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Re: need help filtering a signal
From: |
Paul Kienzle |
Subject: |
Re: need help filtering a signal |
Date: |
Fri, 7 Dec 2001 13:54:40 -0500 |
A implementation of the remez filter is available in octave-forge
(http://octave.sf.net) along with other filter construction
tools such as fir2.
Paul Kienzle
address@hidden
On Fri, Dec 07, 2001 at 05:34:29PM +0100, Philipp Schwaha wrote:
> hi!
>
> what i need to do is fiter a signal to remove noise. what i wanted to try
> first was a fft then cut all frequencies except the the important ones (e.g
> 100Hz, 200Hz ...), but when i did the fft i did not know how to do this,
> since there are no frequencies associated with the values the function fft
> returns.
> this is the first time i try to do something using an fft.
> then i discovered the function fftfilter, but i could not make it produce the
> results i wanted.
>
> how can i remove all frequencies from a certain signal, except a few selected
> ones?
>
> thanks
> philipp
>
>
>
> -------------------------------------------------------------
> Octave is freely available under the terms of the GNU GPL.
>
> Octave's home on the web: http://www.octave.org
> How to fund new projects: http://www.octave.org/funding.html
> Subscription information: http://www.octave.org/archive.html
> -------------------------------------------------------------
>
-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.
Octave's home on the web: http://www.octave.org
How to fund new projects: http://www.octave.org/funding.html
Subscription information: http://www.octave.org/archive.html
-------------------------------------------------------------