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devel / comp.graphics.apps.gnuplot / Re: Multiple coloured point lines

Multiple coloured point lines

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From: dieterha...@gmail.com (db)
Newsgroups: comp.graphics.apps.gnuplot
Subject: Multiple coloured point lines
Date: Wed, 21 Feb 2024 14:21:11 +0100
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by: db - Wed, 21 Feb 2024 13:21 UTC

Here is a mini example

gnuplot << eoi
set term postscript enh color eps 24
set output 'mini.eps'
set xlabel "x"
plot x w p pt 7 rgb 'black', \
x/2 w p pt 7 rgb 'red'
quit
eoi
gv mini.eps

This baulks at the first "rgb":

gnuplot> plot x w p pt 7 rgb 'black', x/2 w p pt 7 rgb 'red'
^
line 0: unexpected or unrecognized token: rgb

But if I leave out the second plot line (and terminate
the first properly (no ", \)) it gives me a plot of
a lot of blue points.
Why can't I have several coloured plots?
--
Dieter Britz

Re: Multiple coloured point lines

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From: mail....@gmx.net (Karl Ratzsch)
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Multiple coloured point lines
Date: Thu, 22 Feb 2024 21:15:12 +0100
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by: Karl Ratzsch - Thu, 22 Feb 2024 20:15 UTC

The syntax is

plot x lc rgb "black", x/2 lc rgb "red"

You missed the "lc" specifier.

Am 21.02.2024 um 14:21 schrieb db:
> Here is a mini example
>
> gnuplot << eoi
> set term postscript enh color eps 24
> set output 'mini.eps'
> set xlabel "x"
> plot x w p pt 7 rgb 'black', \
>      x/2 w p pt 7 rgb 'red'
> quit
> eoi
> gv mini.eps
>
> This baulks at the first "rgb":
>
> gnuplot> plot x w p pt 7 rgb 'black',      x/2 w p pt 7 rgb 'red'
>                          ^
>          line 0: unexpected or unrecognized token: rgb
>
> But if I leave out the second plot line (and terminate
> the first properly (no ", \)) it gives me a plot of
> a lot of blue points.
> Why can't I have several coloured plots?

Subject	Author
Multiple coloured point lines	db
Re: Multiple coloured point lines	Karl Ratzsch