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Re: Re: A Dead Thread? Re. Coloring ExtendGraphics ListContourPlot s...

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  • Subject: [mg22482] Re: [mg22162] Re: [mg19437] A Dead Thread? Re. Coloring ExtendGraphics ListContourPlot s...
  • From: "Mark Harder" <harderm at ucs.orst.edu>
  • Date: Wed, 8 Mar 2000 02:22:21 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

I am belatedly responding to Hartmut Wolf's message.  The method he
suggested did work for me, and I am using it now.  Possibly this is because
it doesn't require MathLink, and therefore works with MultiLink and the
MathLink for Excel package.  Thanks, Hartmut.
-mark harder


-----Original Message-----
From: Hartmut Wolf <hwolf at debis.com>
To: mathgroup at smc.vnet.net
Subject: [mg22482] Re: [mg22162] Re: [mg19437] A Dead Thread? Re. Coloring
ExtendGraphics ListContourPlot s...


>
>Hello Mark,
>
>...I haven't tried this out, but having a look into TWJ's book pp. 480
>it could work if you procceed as
>
>(1) load  Needs["ExtendGraphics`TriangularInterpolate`"]
>
>(2) generate the trangular interpolation function from your data
>
>   fun = TriangularInterpolate[data]
>
>(3) generate a regular array of new data
>
>   new = Table[fun[x,y], {x,...},{y,...}]
>
>(4) use _standard_ built-in ListContourPlot
>
>
>Step (1)-(3) are nothing else but a interpolation problem. Mathematica
>ListInterpolation doesn't work in that case, since it needs a not
>neccessarily equally spaced but rectangular grid. If you can get a
>different interpolation algorithm, or write your own from first
>principles, you could also use that instead.
>
>Kind regards, Hartmut



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