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Groups > comp.graphics.apps.gnuplot > #385

Re: Can contour surface model be saved to file?

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On 17.06.2011 07:52, Bengt T wrote:

> I have a contour plot (meshed surface) build from file with x-, y- and
> z-coordinates and wish to save the mathematical model, generated by
> gnuplot, in some way.

No can do, because there is not really any such model.  None you would 
need gnuplot to generate, anyway.

Gnuplot draws contours by dead simple interpolation of the input data to 
find points along the edges between neighboring data points where the 
contour level might be reached.

I.e. the model, if any, is just a simple triangle mesh set up directly 
by your data points.

> The goal is to use the model to generate z-
> coordinate from new x- and y-coordinates.
>
> Example of input file (x, y, z):
> 1 1 1
> 1 2 2
> 1 3 3
> 2 1 2
> 2 2 4
> 2 3 1

Is the actual data gridded (your example could be, but isn't) or do you 
rely on dgrid3d to do that for you?

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Thread

Can contour surface model be saved to file? Bengt T <bengt_tornqvist@hotmail.com> - 2011-06-16 22:52 -0700
  Re: Can contour surface model be saved to file? Johan B <johan.barne@gmail.com> - 2011-06-17 03:07 -0700
    Re: Can contour surface model be saved to file? Bengt T <bengt_tornqvist@hotmail.com> - 2011-06-17 09:08 -0700
  Re: Can contour surface model be saved to file? Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-06-17 21:26 +0200
    Re: Can contour surface model be saved to file? Bengt T <bengt_tornqvist@hotmail.com> - 2011-06-19 00:37 -0700
      Re: Can contour surface model be saved to file? Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-06-19 16:00 +0200
        Re: Can contour surface model be saved to file? Ingo Thies <ingo.thies@gmx.de> - 2011-06-19 21:30 +0200
          Re: Can contour surface model be saved to file? Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-06-21 00:12 +0200
            Re: Can contour surface model be saved to file? Ingo Thies <ingo.thies@gmx.de> - 2011-06-21 16:00 +0200

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