Groups > comp.graphics.apps.gnuplot > #3723

Filter timeformat by month

Newsgroups	comp.graphics.apps.gnuplot
Date	2017-08-22 08:08 -0700
Message-ID	<15f57c17-f08d-48d3-824a-854ecd0ef05e@googlegroups.com> (permalink)
Subject	Filter timeformat by month
From	Raoul Abrutat <raoul.abrutat@bigpond.com>

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[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?:
"%d/%m/%Y"

# Plot the datum in column 2 against the datum in column 3, 
# only if the datum in column 1 is January, February, ..., December
#
set multiplot layout 4, 3
set datafile separator comma
do for [n = 1 : 12 :1] {
  plot [5:25] [0:360] 'datafile.dat' using (column(2)) : ((column(1))==n ? (column(3)) : NaN) with points
}
unset multiplot

datafile.dat:
01/01/2010, 19.9, 137
01/01/2010, 19.8, 134
01/02/2010,  9.7, 130
01/02/2010,  9.6, 130
01/03/2010, 14.8,  69
01/03/2010, 15.2,  69
01/04/2010, 18.0,  90
01/04/2010, 17.1,  95
01/05/2010,  7.4,  34
01/05/2010,  7.5,  35
01/06/2010, 11.8, 247
01/06/2010, 11.7, 246
01/07/2010, 11.5, 111
01/07/2010, 11.1, 112
01/08/2010,  7.0, 113
01/08/2010,  7.0, 106
01/09/2010, 13.4,  94
01/09/2010, 14.1,  94
01/10/2010, 14.0,  69
01/10/2010, 14.1,  71
01/11/2010, 15.8,  46

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Filter timeformat by month Raoul Abrutat <raoul.abrutat@bigpond.com> - 2017-08-22 08:08 -0700
  Re: Filter timeformat by month Karl Ratzsch <mail.kfr@gmx.net> - 2017-08-22 19:25 +0200
    Re: Filter timeformat by month Raoul Abrutat <raoul.abrutat@bigpond.com> - 2017-08-23 08:02 -0700

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