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Groups > comp.graphics.apps.gnuplot > #4038

Re: Substract value from contour line to surface

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Am 17.09.2018 um 17:17 schrieb laterite@laposte.net:
> Hi,
> 
> I have an analytical 2D function G(x,y) and a .dat file giving me the x0,y0 points solution of the equation G(x0,y0)=0 in a .dat file.

There is not really such a thing as "the" points that fulfill that 
criterion --- at least none where that whole set fits into a finite-size 
data file.  So let's say you have some subset of that in a file.

> Now, I would like to plot the surface of the function G(x,y0)-G(x0,y0).

How isn't that the exact same surface as G(x,y) itself?  You've just 
renamed the second independent variable and subtracted a constant zero!

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Substract value from contour line to surface "laterite@laposte.net" <hematitefr@gmail.com> - 2018-09-17 08:17 -0700
  Re: Substract value from contour line to surface Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2018-09-17 22:25 +0200
    Re: Substract value from contour line to surface "laterite@laposte.net" <hematitefr@gmail.com> - 2018-09-17 22:08 -0700
      Re: Substract value from contour line to surface Karl Ratzsch <mail.kfr@gmx.net> - 2018-09-18 07:46 +0200
        Re: Substract value from contour line to surface "laterite@laposte.net" <hematitefr@gmail.com> - 2018-09-18 00:36 -0700
          Re: Substract value from contour line to surface Gavin Buxton <gavinbuxton@gmail.com> - 2018-09-18 07:34 -0700
          Re: Substract value from contour line to surface Karl Ratzsch <mail.kfr@gmx.net> - 2018-09-18 17:43 +0200
      Re: Substract value from contour line to surface Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2018-09-18 20:11 +0200

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