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MathGroup Archive 2003

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Re: smoothing functions to avoid artifacts in graphs

  • To: mathgroup at smc.vnet.net
  • Subject: [mg39299] Re: smoothing functions to avoid artifacts in graphs
  • From: "Steve Luttrell" <luttrell at _removemefirst_westmal.demon.co.uk>
  • Date: Mon, 10 Feb 2003 01:07:30 -0500 (EST)
  • References: <b258u4$hoj$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

You could smooth the function by using ListConvolve[kernel, sampled
function].

You could use a smoothing kernel likeTable[1/n,{n}] for some small value of
n. Fancier smoothing would use a "tapered" kernel which tails off towards
zero at the edges of the kernel.

--
Steve Luttrell
West Malvern, UK

"Gerald Kaiser" <kaiser at wavelets.com> wrote in message
news:b258u4$hoj$1 at smc.vnet.net...
> I'm trying to make a 3D plot of a rapidly varying positive function,
> but no matter by how much I increase PlotPoints, I get artifacts,
> probably due to  insufficient sampling. When I change the PotPoints
> number, the artifacts change cahracter but remain present. Old plots I
> have with another system of the same function are smooth and reflect its
true
> behavior. Does Mathematica have an option to smooth data before
> plotting?
>
> Thanks,
>
> Gerald Kaiser
> The Virginia Center for Signals and Waves
> http://www.wavelets.com
>
>




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