Groups > comp.graphics.apps.gnuplot > #3789

Re: can I fit two columns when I use timefmt

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From	Jörg Buchholz <bookwood4new@freenet.de>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: can I fit two columns when I use timefmt
Date	Tue, 24 Oct 2017 14:19:32 +0200
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On 24.10.2017 13:30, Jean-Pierre Coulon wrote:
> I have a datafile with lines like 171023_15h11m59s150 <value2> <value3>.
> I know how to plot columns 2 and 3 using set xdata time; set timefmt
> "%y%m%d_%Hh%Mm%Ss"

You plot value2 and value3 by using value1 (your time data) as x value?

plot 'datafile' u 1:2, '' u 1:3

> My model is a = .028; b=.04; model(x) = a*x + b. When I say
> fit modele(x) "mystuff.txt" using 2:3 via a, b I obtain: No data to fit

Here you use value2 as xdata and they don't have a timeformat.

> What is the right way to do?

Before fitting 2:3 unset xdata time by using

set xdata

Jörg

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can I fit two columns when I use timefmt Jean-Pierre Coulon <coulon@cacas.pam.obs-nice.fr> - 2017-10-24 13:30 +0200
  Re: can I fit two columns when I use timefmt Jörg Buchholz <bookwood4new@freenet.de> - 2017-10-24 14:19 +0200
    Re: can I fit two columns when I use timefmt Jean-Pierre Coulon <coulon@cacas.pam.obs-nice.fr> - 2017-10-24 15:13 +0200
      Re: can I fit two columns when I use timefmt Karl Ratzsch <mail.kfr@gmx.net> - 2017-10-24 16:04 +0200
        Re: can I fit two columns when I use timefmt Jean-Pierre Coulon <coulon@cacas.pam.obs-nice.fr> - 2017-10-25 08:10 +0200
          Re: can I fit two columns when I use timefmt Karl Ratzsch <mail.kfr@gmx.net> - 2017-10-25 09:18 +0200
            Re: can I fit two columns when I use timefmt Jean-Pierre Coulon <coulon@cacas.pam.obs-nice.fr> - 2017-10-25 14:35 +0200
      Re: can I fit two columns when I use timefmt Jörg Buchholz <bookwood4new@freenet.de> - 2017-10-25 07:43 +0200
  Re: can I fit two columns when I use timefmt Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2017-10-25 01:01 +0200

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