Groups > comp.graphics.apps.gnuplot > #4040

Re: Substract value from contour line to surface

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From	Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: Substract value from contour line to surface
Date	Tue, 18 Sep 2018 07:46:58 +0200
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Am 18.09.2018 um 07:08 schrieb laterite@laposte.net:
> Le lundi 17 septembre 2018 22:25:51 UTC+2, Hans-Bernhard Bröker a écrit :
>> 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!
> 
> 
> Sorry, my bad, I made a mistake in my explanation :
> 
> I have an analytical 2D function G(x,y) and a .dat file giving me a subset of x0,y0 points solution of the equation dG/dx|_y=0 in a .dat file.
> 
> And no I want to plot G(x,y0)-G(x0,y0)
> 

What are x0 and y0, i.e. which pair from your solution data file do you
want to use for this plot?

Or do you want the set of all those curves?

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Thread

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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