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From: Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Filter timeformat by month
Date: Tue, 22 Aug 2017 19:25:55 +0200
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Am 22.08.2017 um 17:08 schrieb Raoul Abrutat:
> [gnuplot 5.1 patchlevel 0    last modified 2017-02-24, win 32 XP sp3]
> 
> How can one “filter” data - by month - given the timeformat in column (1) of the annual time series?:

Just specify "/" as additional datafile separator and renumber the columns:


set multiplot layout 4, 3
set datafile separator "/,"
set xr [5:25]    # better give the range specs separately,
set yr [0:360]   # cleaner syntax
do for [n = 1 : 12] {
  plot datafile using 4 : ($2==n ? $5 : NaN)
}
unset multiplot