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From: Ethan A Merritt <EAMerritt@gmail.com>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: set range for second independent variable in special file '++'
Date: Mon, 20 Mar 2017 09:39:36 -0700
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Karl Ratzsch wrote:

> Hi,
> 
> this is an example from the help:
> 
>   splot [-2:2][-2:2] sample [h=1:10] '+' using (cos(h)):(sin(h)):(h)

This generates a parametric line in 3D space

> 
> Simple enough. This gives an error, however
> 
>   splot sample [h=-9:9] [d=-0.2:0.2] '++' using
>   (cos(h)):(sin(h)):(h+d)


What is this supposed to describe?
Isolated points?
A set of lines?
A surface?
A set of surfaces?


> . Can i set the range for the second independent variable of "++" and
> still set the x,y display range independently?
> 
> I managed to do it plotting the numbers to a table, and then plotting
> that with different (auto)ranging:
> 
>   set xr [-9:9]
>   set yr [-0.2:0.2]
>   set table $dat
>   splot '++' using (cos(h)):(sin(h)):(h+d)
>   unset table

Those commands as shown do not work.
There must be some other stuff you don't show.
I still a can't figure out what you are aiming for here,
so I can't offer a suggestion how else to get there.

	Ethan

>   reset
>   splot $dat w l
> 
> but I think I'm missing something. ?
> 
>   Karl