[Gnuplot-info] Trouble with labels in multiplot

[marcel1 <cemarcel@u.washington.edu>]

Hi users,
I am running gnuplot 4.2 patchlevel 5 on darwin 8.11.1, having a lot of
trouble adding labels to a 4-panel graph using multiplot. I have read the
manual, searched extensively online, still can't solve my problem. I would
like to: 

i) add labels A, B, C and D to the lower left corners of the four graphs in
my multiplot, in line with the y label
ii) annotate certain graphs with a message, like R^2 = 0.4 in the body of
the plots 

While my plots print out fine, I am experiencing behavior that i don't
understand with the labels. I can get labels to appear on all of the plots,
but I also get a "duplicate" label A that creeps in from the bottom of the
4x4 plot area, as I adjust the position of the desired "A" to the top left
graph. I have tried a variety of changes in the code to see where this comes
from to no avail. 

when I comment out labels that appear later in the code and use >show label
I get:
 label 1 "C" at (0.72, -33, 0) left not rotated back  font "arial, 16"
nopoint
 label 3 "A" at (0.72, 28, 0) left not rotated back  font "arial, 16"
nopoint 

which is what I would want. Strangely, when I do this, the figure also
displays an additional "C" and two misplaced "A"s in seemingly random
locations. Could anyone explain why this is happening and how to set the
labels as I would like them?

Many thanks,
Marcel


#CODE
set nomultiplot
unset title
unset key
unset label

set terminal aqua font "arial, 12"
set size 0.3, 0.3
set grid

set rmargin 0 
set lmargin 0 
set tmargin 0 
set bmargin 0 
set multiplot
set pointsize 0.5

############# plot 1 ##############

set title "mytitle" offset 0, -0.75
set origin 0.1,0.1
set label 1 "C" at  0.72,-33 font "arial, 16"
set label 3 "A" at  0.72,28 font "arial, 16"

set ylabel "label" offset 1.5, 0
set ytics font "arial 18" offset 0, 0
set yrange[45:100]

set xlabel "label" offset 0, 1.1
set xtics font "arial 18" offset 0, 0.3
set xrange[0:1500]

plot 'datafile' using 5:8 with points pt 4 lc 3 lw 8 notitle

############# plot 2 ##############

set title "mytitle" offset 0, -0.75
set nokey

set ylabel "label"
set ytics font "arial 18" offset 0, 0
set yrange[45:100]

set xlabel "label" offset 0, 1.1
set xtics font "arial 18" offset 0, 0.3
set xrange[2:9]

plot 'datafile' using 12:8 with points pt 4 lc 1 lw 8 

############# plot 3 ##############

set title "mytitle" offset 0, -0.75
set origin 0.5,0.1
set key left top
unset label
set label 2 "D" at -0.95,-33 font "arial, 16"
set label 4 "B" at  -0.95,42 font "arial, 16"

set ylabel "label"
set ytics font "arial 18"
set yrange[45:100]

set xlabel "label" offset 0, 1.1
set xtics font "arial 18" offset 0, 0.3
set xrange[1980:2006]

# add regression line for length vs year data
f(x) = m*x + b
fit f(x) 'datafile' using 4:8 via m,b

plot 'datafile' using 4:8 with points pt 5 lc 6 lw 8 title "Length vs year",
f(x) with line title "model fit" 

unset key

############# plot 4 ##############
############# boxplot lengths/stage############

set title "mytitle" offset 0, -0.75
set origin 0.5,0.5
set points 11
set pointsize 0.1
set bars 7.0
set style fill empty

set ylabel "label"
set ytics font "arial 18"
set yrange[45:100]

set xrange[0:5]
set xlabel "label"

plot  'datafile' using 1:3:2:6:5 with candlesticks lt -1 lw 1 title
"quartiles" whiskerbars,  'datafile' using 3:1 with points 26, 'datafile'
using 1:4:4:4:4 with candlesticks lt 1 lw 1 title "median"

set nomultiplot
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