How to draw a circle on a gnuplot figure? - gnuplot

Basically I have a figure below, which is drawn by gnu plot.
The code is listed as follows:
set term pdf size 2.8,1.4 font "Arial,08"
set output "plot/application.pdf"
set datafile separator ","
set offset 0, 0, 0, 0
set size ratio 0.5
set xtics norangelimit
set ytics nomirror
set termoption dashed
set ylabel "Binary Similarity (%)"
set xlabel "Iteration"
set yrange [0:110]
set style data linespoints
set key vertical maxrows 5
set key top right
set key vertical maxrows 5
set style line 2 lt 1 lc rgb "skyblue" lw 1
set style arrow 8 heads size screen 0.008,90 ls 2 lw 10
set arrow from 9.0,0 to 9.0,40 nohead lw 1 as 8
plot 'plot/application.csv' using 1:xtic((int($0)%4)==0?sprintf("%d", $0*10):"") title columnheader(1) pt 1 lw 1, \
'' using 2 title columnheader(2) pt 2 lw 1 ps .1 lc rgb "#4169E1", \
'' using 3 title columnheader(3) pt 3 lw 1 ps .1 lc rgb "#DAA520", \
'' using 4 title columnheader(4) pt 4 lw 1 ps .1 lc 5, \
'' using 5 title columnheader(5) pt 4 lw 1 ps .1 lc 9, \
'' using 6 title columnheader(6) pt 4 lw 1 ps .1 lc 7, \
'' using 7 title columnheader(7) pt 5 lw 1 ps .1 lc 8, \
'' using 7 title columnheader(8) pt 5 lw 1 ps .1 lc 9
I basically want to highlight datas at 90, and that's why I draw a blue arrow line there.. But as you can see, it looks awkward...
So I am thinking to change the blue line into a red circle, something like this:
Does anyone know how to do that? Note that it even has an associated legend of the red circle.. Thank you!

You can always add
'< echo 90 20 10' w circ
to the plot.

Related

gnuplot: how to set the different fill and border colors for `with points`?

I would like to achieve a similar effect in gnuplot.
Here is what I tried:
unset key
set style line 11 lc rgb '#808080' lt 1
set border 3 ls 11
set tics nomirror
set grid
set style line 1 lc rgb '#808080' pt 9 ps 3
set style line 2 lc rgb '#808080' pt 20 ps 3
set style line 3 lc rgb '#BD3828' pt 7 ps 3
set yrange [4:9]
$data << EOD
5 5.1
5.3 6.8
6 6
EOD
$data2 << EOD
5 5
7 7
8 6
EOD
$data3 << EOD
5.5 7
6 6
7 7.1
EOD
plot $data u 1:2 w points ls 1, $data2 u 1:2 w points ls 2, \
$data3 u 1:2 w points ls 3
As we can see, points can be overlapped. Then how can we darken the overlap areas?
A possible solution is to set transparency (e.g., lc rgb '#80808080'), but it will also make both border and filling transparent. So how to set the different fill and border colors for with points?
Another solution is to use set object, but we need to do more work to read data from files.
I think the closest you could come to what you describe is to draw the points in two passes.
First pass: draw using a point type that produces only the outlines (point types N = 4 6 8 10 12 ...).
Second pass: draw using the corresponding point type N+1 that produces only the interior, using the same color but adding an alpha channel value to make it partially transparent.
set print $RAND1
do for [i = 1:50] { print rand(0), rand(0) }
unset print
set print $RAND2
do for [i = 1:50] { print rand(0), rand(0) }
unset print
set pointsize 4
plot $RAND1 with points pt 8 lc rgb "#00b8860b", \
'' with points pt 9 lc rgb "#AAb8860b", \
$RAND2 with points pt 6 lc rgb "#00c04000", \
'' with points pt 7 lc rgb "#AAc04000"

How to make "filledcurves" change color when two or more meet? (GNUPlot)

I have created a graph that uses lines for the average of my data and filledcurves for the error (average-error, average+error). My problem is that the last filledcurves that is plotted, covers all other fills, even though I have set its transparency. I want to change this so that when two or more filledcurves meet the color is changed and thus the errors are clearly shown for all lines.
My script is:
set datafile separator whitespace
set style line 1 lc rgb '#aa5500' lt 1 lw 2 pt 7 ps 1
set style line 2 lc rgb '#55aaff' lt 1 lw 2 pt 7 ps 1
set style line 3 lc rgb '#aa557f' lt 1 lw 2 pt 7 ps 1
set style line 4 lc rgb '#55007f' lt 1 lw 2 pt 7 ps 1
set style line 5 lc rgb '#005500' lt 1 lw 2 pt 7 ps 1
set style line 6 lc rgb '#0055ff' lt 1 lw 2 pt 7 ps 1
set tics nomirror
set tics front
set style line 12 lc rgb '#808080' lt 0 lw 1
set grid front ls 12
set output 'network_utilization_servers_3_2.png'
set terminal png size 1000,800
set style fill transparent solid 0.25
set style fill noborder
set xrange[0:77]
set yrange[0:1500]
set xlabel "Time (seconds)" font ",12"
set ylabel "Incoming Traffic (KB/s)" font ",12"
set title "Network Utilization in the Servers" font "Helvetica,16"
set key box title "Server" width 10
plot for [i=0:|Group|-1] $Data3 u ($2-6):($3-$4):($3+$4) index i with filledcurves ls i+1 notitle, \
for [i=0:|Group|-1] $Data3 u ($2-6):3:4 index i w lines ti sprintf("%g",Group[i+1]) ls i+1
and my pragh:
My goal is something like this:
Is there a way to achieve this?

Gnuplot set background color of data label

I want to set the background of data labels to white! The considered plot is a data plot of the following data (gnuDC.dat):
4 1570.96 1571
8 770.63 771
12 530.33 530
16 385.13 385
24 261.87 262
48 137.71 138
96 81.42 81
The plot command reads:
plot "gnuDC.dat" using 1:2 title "DC: GNU Fortran 4.7.2 + Open MPI 1.6.3" w p ls 1, \
"gnuDC.dat" using 1:2:3 with labels center offset 2.,0.7 font "Helvetica,14" tc ls 4 notitle, \
"gnuDC.dat" using 1:3 notitle smooth csplines ls 14
Which gives me:
It looks ok but think one could read the lables better when the would have an white background. Is there an easy way to add the white background for all labels at once?
Here is the whole print file:
set terminal postscript eps size 14cm,10cm enhanced color \
font 'Helvetica,18' linewidth 2
set output 'test.eps'
# Line style for axes
set style line 80 lt 0
set style line 80 lt rgb "#808080"
# Line style for grid
set style line 81 lt 3 # dashed
set style line 81 lt rgb "#808080" lw 0.5 # grey
set grid back linestyle 81
set border 3 back linestyle 80
set xtics nomirror
set ytics nomirror
set style line 100 lc rgb '#0060ad' lt 1 lw 2 pt 7 ps 1.5
set style line 200 lc rgb '#a2142f' lt 1 lw 2 pt 7 ps 1.5
set pointintervalbox 0
set style line 1 lc rgb '#0072bd' lt 1 lw 1 pt 9 pi -10 ps 2
set style line 2 lc rgb '#77ac30' lt 1 lw 1 pt 7 pi -10 ps 2
set style line 3 lc rgb '#d95319' lt 1 lw 1 pt 1 pi -10 ps 2
set bmargin 4
set lmargin 5
set rmargin 4
unset title
set size 1,1
#set origin 0,0.27
set xlabel "number of cores, -"
set ylabel "Computational time, s"
set key top right
set key spacing 1.5
set key width -12
set yrange [0:1710]
plot "gnuDC.dat" using 1:2 title "DC: GNU Fortran 4.7.2 + Open MPI 1.6.3" w p ls 1, \
"gnuDC.dat" using 1:2:3 with labels center offset 2.,0.7 font "Helvetica,14" tc ls 4 notitle, \
"gnuDC.dat" using 1:3 notitle smooth csplines ls 14
With gnuplot version 5 there is a boxed option which does exactly this: give labels a background and, if you want, also a border. The style is controlled with set style textbox, e.g.
set style textbox opaque noborder
plot ... with labels boxed ...
Applied to your script (with some minor changes due to the changed dash handling since 5.0):
# Line style for axes
set style line 80 lt rgb "#808080"
# Line style for grid
set style line 81 dt 3 # dashed
set style line 81 lt rgb "#808080" lw 0.5 # grey
set grid back linestyle 81
set border 3 back linestyle 80
set tics nomirror
set linetype 1 lc rgb '#0072bd' pt 9 pi -10 ps 2 dt 3
set bmargin 4
set lmargin 5
set rmargin 4
set xlabel "number of cores, -"
set ylabel "Computational time, s"
set key top right
set key spacing 1.5
set key width -12
set yrange [0:1710]
set style textbox opaque noborder
plot "gnuDC.dat" using 1:2 title "DC: GNU Fortran 4.7.2 + Open MPI 1.6.3" w p lt 1, \
"gnuDC.dat" using 1:2:3 with labels boxed center offset 2.,0.7 font "Helvetica,10" tc ls 1 notitle, \
"gnuDC.dat" using 1:3 notitle smooth csplines lt 1
No, for versions 4.6 and earlier there isn't an easy way to achieve this.

Set point size independent of line weight

I have the following line styles defined in gnuplot:
set linetype 1 lc rgb "red" lw 3 pt 7
set linetype 3 lc rgb "red" lw 1 pt 7
It appears as though the points derive part of their size from the lineweight. I'm using these styles inside of a plot for loop with linetype cycle using the same style for a cspline and the corresponding points, so I don't see any easy way to just define a separate style for the points.
I get results like this:
The points respond to pointsize but the point in linetype 1 is still slightly larger (presumably from the thicker border).
Is it possible to get the points in these two styles to be the same size?
In response to Miguel's comment, a more complete example of my use case is:
filenames = "A B C D"
set linetype 1 lc rgb "blue" lw 3 pt 7
set linetype 2 lc rgb "red" lw 3 pt 7
set linetype 3 lc rgb "blue" lw 1 pt 7
set linetype 4 lc rgb "red" lw 1 pt 7
set linetype cycle 4
plot for [file in filenames] file.".csv" \
using 1:2
title file \
smooth csplines, \
for [file in filenames] file.".csv" \
u 1:2 with points notitle
linetypes 5-8 get set by the cycling and are used by the last part of the plotting command. Recommendations on another way to do this would be welcome!
For your very specific case you can set more styles, and do it rather automatically with a do for loop (reusing your code):
filenames = "A B C D"
do for [i=0:1] {
set linetype (4*i+1) lc rgb "blue" lw (i == 1 ? 0 : 3) pt 7
set linetype (4*i+2) lc rgb "red" lw (i == 1 ? 0 : 3) pt 7
set linetype (4*i+3) lc rgb "blue" lw (i == 1 ? 0 : 1) pt 7
set linetype (4*i+4) lc rgb "red" lw (i == 1 ? 0 : 1) pt 7
}
set linetype cycle 8
plot for [file in filenames] file.".csv" \
using 1:2 \
title file \
smooth csplines, \
for [file in filenames] file.".csv" \
u 1:2 with points notitle
With some simple data files:
For some terminals the size of filled point types depends on the linewidth because they have a border. This is the case for all cairo-based terminals (pdfcairo, pngcairo, wxt and cairolatex), whereas other terminal like svg, postscript, qt don't show this behaviour.
As test case consider
set linetype 1 lc rgb "red" lw 3 pt 7
set linetype 3 lc rgb "red" lw 1 pt 7
set samples 11
set style function linespoints
plot x lt 1, x + 0.5 lt 3
Considering that you want to have the linepoints samples in the legend, you're best choice is to reduce the point size a bit for the line type with the larger linewidth, like
set linetype 1 lc rgb "red" lw 3 pt 7 ps 0.9
The choice of the scaling factor must be determined manually.

Thicker lines in the legend of gnuplot

I'm plotting some data curves with gnuplot, and they look like this:
However, the line samples in the legend are too thin. When you have more curves, it becomes hard to distinguish the colors. You can increase the thickness of the curves using "linewidth", e.g., by adding "lw 3" to the plot command, and you'd get this:
However, this increases the thickness everywhere. Is it possible to make the lines thick in the legend only? I know it can be done "the other way", by postprocessing on the output .png file. But is there a direct approach, using some gnuplot setting/wizardry?
Unfortunately, I don't know a way to control the thickness of the lines in the key, since they correspond to the lines being drawn. You can see what you can change by typing help set key in gnuplot.
Using multiplot, you can draw the plot lines first without the key, then draw the key again for 'ghost lines'. Here is a code sample which would do that:
set terminal png color size 800,600
set output 'plot.png'
set multiplot
unset key
plot '../batteries/9v/carrefour.txt' w lp, \
'../batteries/9v/philips.txt' w lp, \
'../batteries/9v/sony.txt' w lp
set key; unset tics; unset border; unset xlabel; unset ylabel
plot [][0:1] 2 title 'Carrefour' lw 4, \
2 title 'Philips' lw 4, \
2 title 'Sony' lw 4
In the second plot command, the function 2 (a constant) is being plotted with a y range of 0 to 1, so it doesn't show up.
I ran across this post and it gave me a critical idea.
The provided solution does not work in multiplot mode, since the second plot command will trigger the second plot, which is most likely not desired.
as a workaround one can set the original data as "notitle", then plot data outside of range with the same linetype and color in different thickness with the desired title. I'll just leave my current example here. It also includes linestyles that i have declared. So i just use the same linestyle (ls) to get the same color but change the thickness on the second line.
# for pngs
set terminal pngcairo size 1600,600 font ',18' enhanced
set output "pic_multi_kenngr_ana.png
set style line 2 lc rgb '#0ce90b' lt 1 lw 1.5 # --- green
set style line 3 lc rgb '#09e0b3' lt 1 lw 1.5 # .
set style line 4 lc rgb '#065fd8' lt 1 lw 1.5 # .
set style line 5 lc rgb '#4e04cf' lt 1 lw 1.5 # .
set style line 6 lc rgb '#c702a9' lt 1 lw 1.5 # .
set style line 7 lc rgb '#bf000a' lt 1 lw 1.5 # --- red
set multiplot layout 1,2
set xtics rotate
set tmargin 5
set xtics 12
set grid xtics
# set axis labels
set ylabel 'T [K]'
set xlabel 'Zeit [h]'
# select range
set xrange [0:48]
set yrange [290.15:306.15]
set title "(a) Bodentemperatur"
set key top right Right
plot 'par_crank_hom01lvls.04.dat' u 1:3 with lines ls 7 notitle,\
'par_crank_str01lvls.16.dat' u 1:3 with lines ls 2 notitle,\
500 t 'z = 4 cm' ls 7 lw 4,\
500 t 'z = 16 cm' ls 2 lw 4
################################################
set title "(b) Bodenwärmestrom an der Oberfläche"
set ylabel 'G [W m^{-2}]'
set yrange[-110:110]
unset key
plot 'par_crank_str01_ghf.dat' u 1:3 with lines
unset multiplot
I hope this will help someone
An even more simple work-around (imho) is to define the colours explicitly and plot each line twice, once with high lw for the key and also with the title to appear in the key, but adding "every ::0::0" which effectively ends up in plotting nothing, and once the normal way. See the following code snippet:
plot data u 0:1 w l linecolor rgb #1b9e77 lw 2 t "",\
data every ::0::0 u 0:1 w l linecolor rgb #1b9e77 lw 4 t "Title"
To expand on the NaN comment by #Svalorzen, the following will graph two lines of width 1 from some datafile.txt with no titles and create matching blank lines with the specified titles and width 5 for the key only:
plot [][]\
NaN title "Title1" w line lt 1 lc 1 lw 5,\
NaN title "Title2" w line lt 1 lc 2 lw 5,\
"datafile.txt" using 1:2 title "" w line lt 1 lc 1 lw 1,\
"datafile.txt" using 1:3 title "" w line lt 1 lc 2 lw 1
I find an answer for this:
Set key linewidth
in your case, must be:
plot '../batteries/9v/carrefour.txt' w l lw 1 linetype 1 notitle, 0/0 linetype 1 linewidth 5 title 'Carrefour'
rep '../batteries/9v/philips.txt' w l lw 1 linetype 2 notitle, 0/0 linetype 2 linewidth 5 title 'Philips'
rep '../batteries/9v/sony.txt' w l lw 1, linetype 3 notitle, 0/0 linetype 3 linewidth 5 title 'Sony'
Try something like:
plot # ... \
keyentry w l lw 1 lc 2 t "Title" # ...
And remove the old keys.

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