Groups > comp.graphics.apps.gnuplot > #2088

Re: change line color when plot crosses Y value

X-FeedAbuse	http://nntpfeed.proxad.net/abuse.pl feeded by 88.191.16.109
Path	csiph.com!eeepc.pasdenom.info!news.pasdenom.info!news.dougwise.org!nntpfeed.proxad.net!nospam.fr.eu.org!usenet-fr.net!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	Olaf Schultz <o.newsa@enhydralutris.de>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: change line color when plot crosses Y value
Date	28 Jan 2011 15:53:15 GMT
Lines	36
Message-ID	<8qg73bFjd1U2@mid.individual.net> (permalink)
References	<15c8f4bc-fd7b-4486-972d-9321f6c96c62@m27g2000prj.googlegroups.com>
Mime-Version	1.0
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	8bit
X-Trace	individual.net f1o7eDFFhd6G9rxs75nY4A3JNbXnxm7sQAMJT370YTiUTeIejZ
Cancel-Lock	sha1:Yutb/bUs8KlSpcOx6Kia/k9oZ2w=
User-Agent	Pan/0.132 (Waxed in Black)
Xref	csiph.com comp.graphics.apps.gnuplot:2088

Show key headers only | View raw

On Fri, 28 Jan 2011 06:41:28 -0800, ginginsman wrote:

> I know I have seen this somewhere but cannot find it: I'd like to find a
> way to change the color of a plot line when it crosses a specified value
> of Y; blue above, red below, for example.
> 
> with data like this:
> 
> 2011/02/01-03:31	0.59
> 2011/02/01-09:48	9.93
> 2011/02/01-16:11	-0.34
> 2011/02/01-22:24	8.88
> 2011/02/02-04:18	0.44
> 2011/02/02-10:32	9.96
> 2011/02/02-16:53	-0.36
> 
> set xdata time
>  
set timefmt x  "%Y/%m/%d-%H:%M"
>  
set samples 1000
>  
plot 'data.txt' u 1:2 sm cspl
> 
> Find a way to change the curve color at any value > or < 1 (for
> example).

maybe the hard way:

ycr=0.1
plot "data.txt u 1:($2>ycr?$2:1/0) lt 1 ,"" u 1:($2<=ycr?$2:1/0) lt 2 t ""


> OSX 10.6.6
> GNUplot Version 4.4 patchlevel 2

Back to comp.graphics.apps.gnuplot | Previous | Next | Find similar | Unroll thread

Thread

Re: change line color when plot crosses Y value Olaf Schultz <o.newsa@enhydralutris.de> - 2011-01-28 15:53 +0000

csiph-web