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From: Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: 3d gnuplot
Date: Wed, 29 Nov 2017 08:14:14 +0100
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Am 29.11.2017 um 06:03 schrieb Mokhlesur rahman:
> This is a auto generated gnuplot code. Can anyone rephrase it to me ? 
> I need to understand after $, there is no colomn number, so how does it work? which column number will it use ? 
> 
> 
> gnuplot> splot  './gs_lines.out' u (0.5*(2*$+$)/($c4+$+$)):(sqrt(3)/2*($)/($c4+$+$)):($6) t "known gs" w lp pt 4
>                                             ^
>          Column number or datablock line expected

Where'd you get it from? Because that line can't work.