From help-request at octave dot org Thu Jul  7 09:55:04 2005
Subject: Re: Convolving a non-uniformly sampled signal with a Gaussian
From: "Robert A. Macy" <macy at california dot com>
To: =?ISO-8859-1?Q?S=F8ren?= Hauberg <soren at hauberg dot org>
Cc: help at octave dot org
Date: Thu, 07 Jul 2005 07:50:27 -0700

I'm going to guess...

You *have* to make a uniform distribution along the
function in order for the integration of the convolution to
work properly.  

When there was no alternative to "gsplot"ing an array that
had nonuniform steps (similar to your problem) and I had to
convert to uniform steps; I wrote a simple program for
uniform interpolation.  I'll send it to you separately due
to size.  [Lot's of boiler plate for error checking]

         - Robert -

On Thu, 07 Jul 2005 15:43:22 +0200
 Søren Hauberg <soren at hauberg dot org> wrote:
> Hi
> I have a signal that I need to convolve with a Gaussian
> (or another similar filter). The problem is that the
> signal is not uniformly sampled, meaning I can't use conv
> directly. My first thought was to interpolate the signal,
> perform convolution, and then resample, but I don't want
> to do this as the function that generated isn't
> continuos.
> 
> Does anybody know a easy way to do this, or do I have to
> implement this from scratch.
> 
> /Søren
> 



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