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MathGroup Archive 2000

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Re: How to grid ungridded data

  • To: mathgroup at smc.vnet.net
  • Subject: [mg23474] Re: How to grid ungridded data
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 12 May 2000 22:54:16 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <8fdfuj$ng0@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

you *must* triangulate irregular data. If it is too slow you should 
look on Tom Wickham-Jones packages -- there is a Delaunay triangulation
in a C program that much faster than the pure Mathematica version

http://www.mathsource.com/Content/Enhancements/Graphics/3D/0208-976


Regards
  Jens

Manolis Petrakis wrote:
> 
> Hi there,
> 
> (I suppose this is a common problem for everyone who want to handle
> experimental data...)
> 
> Well I want to find an efficient (and especially fast) way to grid data, and
> then to apply splines or fits, etc.
> 
> For example imagine importing temperatures from weather stations all around
> a country, and you want to plot contours, (like the fancy charts on TV
> weather bulletins). So far I know that Mathematica (we are talking for
> version 3.0 here) can plot contours for gridded data.
> 
> I made a first attempt with triangulation but it's sooooooo slow...
>


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