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From: Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: double y plot
Date: Wed, 2 Oct 2019 08:57:11 +0200
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Xref: csiph.com comp.graphics.apps.gnuplot:4236

Am 01.10.2019 um 16:05 schrieb alberto:
> Hi, 
> I would plot graph with same x axis and different y axis 
> 
> for an y axis I use
> 
> plot [-1:1.5][:] 'trace_300_gnu.txt' using (($1*13.60)-4.64665):(abs($6)), with lines lc rgb 'black' lw 2 lt 1 title "OO"
> 
> instead for ather y is 
> plot [-1:1.5][:] 'trace_300_gnu.txt' using (($1*13.60)-4.64665):(abs($4)), with lines lc rgb 'red' lw 2 lt 1 title "OO"

You should perhaps give them a different title, but the general
syntax is

  set xr [1:1.5]
  plot firstdata
  replot seconddata

You can give the range specifiers inline, but only with the first plot.

Or in one line

   plot [a:b] dataf using 1:2, dataf using 1:3, dataf using 1:4

and you can break the line with backslashes

And a quick look into the help would have told you the same ;)

    Karl