Groups > comp.graphics.apps.gnuplot > #3975

Re: consistency of function .vs. data plotting

X-Received	by 2002:a6b:6d19:: with SMTP id a25-v6mr5470148iod.16.1529941385380; Mon, 25 Jun 2018 08:43:05 -0700 (PDT)
X-Received	by 2002:aca:5f05:: with SMTP id t5-v6mr474358oib.2.1529941385246; Mon, 25 Jun 2018 08:43:05 -0700 (PDT)
Path	csiph.com!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!d7-v6no4079550itj.0!news-out.google.com!z3-v6ni4456iti.0!nntp.google.com!d7-v6no4079546itj.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups	comp.graphics.apps.gnuplot
Date	Mon, 25 Jun 2018 08:43:05 -0700 (PDT)
In-Reply-To	<a7122b88-09e6-4e90-a094-09d175c8b66b@googlegroups.com>
Complaints-To	groups-abuse@google.com
Injection-Info	glegroupsg2000goo.googlegroups.com; posting-host=95.91.210.128; posting-account=dOCFDgoAAADjxX1_Z07BOmxhzKhUF2Q5
NNTP-Posting-Host	95.91.210.128
References	<a7122b88-09e6-4e90-a094-09d175c8b66b@googlegroups.com>
User-Agent	G2/1.0
MIME-Version	1.0
Message-ID	<3ed0480d-dd03-40ed-adec-e94ff6d8bdfb@googlegroups.com> (permalink)
Subject	Re: consistency of function .vs. data plotting
From	palme@kapott.org
Injection-Date	Mon, 25 Jun 2018 15:43:05 +0000
Content-Type	text/plain; charset="UTF-8"
Lines	35
Xref	csiph.com comp.graphics.apps.gnuplot:3975

Show key headers only | View raw

Thanks!

-stefan-


On Tuesday, 19 June 2018 18:41:20 UTC+2, pa...@kapott.org  wrote:
> Hi all,
> 
> I am quite new to gnuplot, so maybe I am just not knowing some basics.
> 
> My understanding of the documentation is that something like "plot f(x)" is equivalent to "plot '+' using 1:(f($1))". 
> 
> Of course the former uses "set style function" as default plotting style, and the latter "set style data", but that's not my point...
> 
> My issue is that if f(x)=asin(x) the result is different: plotting the pure function does NOT plot points for the complex results in the range outside [-1,1]. 
> 
> But the approach using the pseudo data file plots also points for the complex results outside the [-1,1] range.
> 
> See yourself:
>   print "using pure function"
>   plot asin(x)
>   pause -1 "press enter"
>   print "using pseudo data file"
>   plot '+' using 1:(asin($1)) with lines
>   pause -1 "press enter"
> 
> So I have two questions:
> 
> 1) Where exactly is my misunderstanding of the documentation, regarding the way how data file plotting works in comparison to plotting pure functions?
> 
> 2) How can I avoid these complex results to be plotted with the second approach?
> 
> Thanks and regards
> -stefan-

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

Thread

consistency of function .vs. data plotting palme@kapott.org - 2018-06-19 09:41 -0700
  Re: consistency of function .vs. data plotting Karl Ratzsch <mail.kfr@gmx.net> - 2018-06-25 16:06 +0200
    Re: consistency of function .vs. data plotting Karl Ratzsch <mail.kfr@gmx.net> - 2018-06-25 23:55 +0200
  Re: consistency of function .vs. data plotting palme@kapott.org - 2018-06-25 08:43 -0700

csiph-web