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From: Bengt T <bengt_tornqvist@hotmail.com>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Can contour surface model be saved to file?
Date: Fri, 17 Jun 2011 09:08:52 -0700 (PDT)
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On Jun 17, 12:07=A0pm, Johan B <johan.ba...@gmail.com> wrote:
> On Jun 17, 1:52=A0am, Bengt T <bengt_tornqv...@hotmail.com> 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. 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
> > etc.
>
> > After saving the model I wish to be able to generate z-coordinate for
> > any x-/y-coordinates within the surface. For example, x=3D1.8 and y=3D1=
.4.
>
> > Is it possible to save the model generated in a plot or are there any
> > other suggestions?
>
> Hi Bengt!
>
> You can always use the "save" command which saves userdefi=0Cned
> functions, variables, the set term status, all set options, or all
> of these, plus the last plot (splot) command to the speci=0Ced file
> with the save command and later reload them with the "load" command.
> All according to the manual athttp://www.gnuplot.info/docs_4.4/gnuplot.pd=
f
>
> To the best of my knowledge, you would have to use a suitable 2-
> dimensional function, then fit with the fit command as described in:http:=
//gnuplot.sourceforge.net/demo_4.4/fit.html
>
> This was you can use the function with the generated fit parameters to
> later get a z value for any given x and y.
>
> There might be other ways as well, but then beyond my (somewhat
> limited) knowledge.

Thanks for response. I looked into the gnuplot.pdf  file and found
"table", which maybe is what I was searching for.