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computers / comp.graphics.apps.gnuplot / Legend behavior would multiplot

SubjectAuthor
* Legend behavior would multiplotDarby
+- Re: Legend behavior with multiplotDarby
+- Re: Legend behavior would multiplotJörg_Buchholz
`- Re: Legend behavior would multiplotJörg_Buchholz

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Subject: Legend behavior would multiplot
From: Darby
Newsgroups: comp.graphics.apps.gnuplot
Date: Tue, 14 Apr 2020 20:43 UTC
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Subject: Legend behavior would multiplot
From: darby.vi...@gmail.com (Darby)
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I've run into a problem with controlling the legend when using multiplot.  I want the legend to stay in 1 column on the right side of the plot.  With just a single plot per page, this works.  But if I use multiplot (4 plots per page, layout 2,2), the legend wants to split into multiple columns, even if I try to force it to one column with "maxcols 1".  In this case, the legend is too wide and obscures some of the plots.  However, a multiple with two tall plots side by side seems to do the right thing.  So it seems like this is tied to the size of the plot, not the page.  I've recreated this with some simple examples below.  I'm using gnuplot 4.6 patchlevel 2 on CentOS 7.7. 






set xrange [-pi:pi]
set key at screen 1,1

# ----------

# The legend for a single plot seems to respect the space of the plot
# and only uses 1 column.

set size 0.9,1.0
plot for [i=1:5] 10*sin(i*x) w l t 'sin',\
     for [i=1:5] 10*cos(i*x) w l t 'cos',\
     for [i=1:5]     i*x     w l t 'line',\
     for [i=1:5]    -i*x     w l t 'line'
pause -1

# ----------

# The legend for a multiplot seems NOT to respect the space of the plots
# and uses 2 columns, despite the explicit request for one column.

set key maxcols 1
set multiplot layout 2,2 scale 0.8, 1.0

   replot
   replot
   replot
   replot

unset multiplot

pause -1

# ----------

# But a "layout 1,2" multiplot will do one column.  Is it based on the height of the
# plot? 

set multiplot layout 1,2 scale 0.8, 1.0

   replot
   replot

unset multiplot

pause -1
# ----------


Subject: Re: Legend behavior with multiplot
From: Darby
Newsgroups: comp.graphics.apps.gnuplot
Date: Tue, 14 Apr 2020 20:47 UTC
References: 1
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Subject: Re: Legend behavior with multiplot
From: darby.vi...@gmail.com (Darby)
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Arg, subject was supposed to be "Legend behavior with multiplot"...


Subject: Re: Legend behavior would multiplot
From: Jörg_Buchholz
Newsgroups: comp.graphics.apps.gnuplot
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Date: Thu, 16 Apr 2020 11:22 UTC
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From: bookwood...@freenet.de (Jörg_Buchholz)
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Legend behavior would multiplot
Date: Thu, 16 Apr 2020 13:22:56 +0200
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On 14.04.2020 22:43, Darby wrote:
I've run into a problem with controlling the legend when using
multiplot.  I want the legend to stay in 1 column on the right side
of the plot.  With just a single plot per page, this works.  But if I
use multiplot (4 plots per page, layout 2,2), the legend wants to
split into multiple columns, even if I try to force it to one column
with "maxcols 1".  In this case, the legend is too wide and obscures
some of the plots.  However, a multiple with two tall plots side by
side seems to do the right thing.  So it seems like this is tied to
the size of the plot, not the page.  I've recreated this with some
simple examples below.  I'm using gnuplot 4.6 patchlevel 2 on CentOS
7.7.


In your example you generate a legend for every plot at the same place.
A legend can't be longer or higher than the plot itself.

You can specify the place of every key entry separately in the plot
command. Than you can place the key entry where ever you want.

I don't know if this works with gnuplot 4.6, I tested it with gnuplot 5.2



set xrange [-pi:pi]
set key at screen 1,1
set key maxcols 1
set multiplot layout 2,3 columnsfirst scale 1.0, 1.0
plot 10*sin(1*x) w l t 'sin' at 0.9,0.9,\
     10*sin(2*x) w l t 'sin' at 0.9,0.86,\
     10*sin(1*x) w l t 'sin' at 0.9,0.82,\
     10*sin(2*x) w l t 'sin' at 0.9,0.78,\
     10*sin(2*x) w l t 'sin' at 0.9,0.74,\
     10*cos(1*x) w l t 'cos' at 0.9,0.70,\
     10*cos(2*x) w l t 'cos' at 0.9,0.66,\
     10*cos(1*x) w l t 'cos' at 0.9,0.62,\
     10*cos(2*x) w l t 'cos' at 0.9,0.58,\
     10*cos(2*x) w l t 'cos' at 0.9,0.54,\
     1*x w l t 'line' at 0.9,0.50,\
     2*x w l t 'line' at 0.9,0.46,\
     3*x w l t 'line' at 0.9,0.42,\
     4*x w l t 'line' at 0.9,0.38,\
     5*x w l t 'line' at 0.9,0.34,\
     -1*x w l t 'line' at 0.9,0.30,\
     -2*x w l t 'line' at 0.9,0.26,\
     -3*x w l t 'line' at 0.9,0.22,\
     -4*x w l t 'line' at 0.9,0.18,\
     -5*x w l t 'line' at 0.9,0.14
unset key
replot
replot
replot
unset multiplot


Jörg




Subject: Re: Legend behavior would multiplot
From: Jörg_Buchholz
Newsgroups: comp.graphics.apps.gnuplot
Organization: A noiseless patient Spider
Date: Mon, 20 Apr 2020 12:31 UTC
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From: bookwood...@freenet.de (Jörg_Buchholz)
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Legend behavior would multiplot
Date: Mon, 20 Apr 2020 14:31:06 +0200
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On 14.04.20 22:43, Darby wrote:
I've run into a problem with controlling the legend when using
multiplot.  I want the legend to stay in 1 column on the right side
of the plot.  With just a single plot per page, this works.  But if I
use multiplot (4 plots per page, layout 2,2), the legend wants to
split into multiple columns, even if I try to force it to one column
with "maxcols 1".  In this case, the legend is too wide and obscures
some of the plots.  However, a multiple with two tall plots side by
side seems to do the right thing.  So it seems like this is tied to
the size of the plot, not the page.  I've recreated this with some
simple examples below.  I'm using gnuplot 4.6 patchlevel 2 on CentOS
7.7.

You can do a "dummyplot" only for the key. This works with older versions than 5.2

reset
unset key
set xrange [-pi:pi]
set multiplot
set size 0.4,0.5
set origin 0.0,0.0
plot for [i=1:5] 10*sin(i*x) w l t 'sin',\
      for [i=1:5] 10*cos(i*x) w l t 'cos',\
      for [i=1:5]     i*x     w l t 'line',\
      for [i=1:5]    -i*x     w l t 'line'

set size 0.4,0.5
set origin 0.0,0.5
replot

set size 0.4,0.5
set origin 0.4,0.0
replot

set size 0.4,0.5
set origin 0.4,0.5
replot

#---dummyplot--------
set key left
set size 0.2,1.0
set origin 0.8,0.0
unset grid
unset tics
unset border
set xrange [0:1]
set yrange [0:1]
plot for [i=1:5] (10*sin(i*x))-10 w l t 'sin',\
      for [i=1:5] (10*cos(i*x))-10 w l t 'cos',\
      for [i=1:5]     (i*x)-10     w l t 'line',\
      for [i=1:5]    (-i*x)-10     w l t 'line'

unset multiplot


Jörg


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