I have many data files in a directory. Each data file has various columns and I want vector plots using a few of them. Earlier I was generating .png files using a .gp script and combining them into a movie. I need outputs in PDF format also for showing in presentation and including in articles. The png script is:

set terminal pngcairo
set xla 'x'
set yla 'y'
scl=3
do for [i=0:10000:200]{
    set output sprintf('vector_frame%04.0f.png',i)
    plot 'data.'.i.'.dat' u 3:4:($5/scl):($6/scl) w vec ti sprintf("frame %d",i)
    set output

The resolution of png images is much poorer than that of the qt terminal and the plots are often not of much help. The pdf outputs from pdfcairo are also not good. In addition, there are situations where I have to `set size ratio 2'. There the _labels on the x-axis overlap_. The code and a sample output are given blow.

set terminal pngcairo
set xla 'x'
set yla 'y'
set size ratio 2
scl=3
set output 'pngeg.png'
plot 'data.2000.dat' u 3:4:($5/scl):($6/scl) w vec

I want to know what is the best way to save gnuplot vector plots in a form which is closest to the qt output and of good resolution. I need to do thousands of such plots in multiple directories. So a _script_ to do the same would be very helpful. I require outputs in **PDF** format. However, can pdf files be combined to make a movie or animation? Otherwise, I would need png images also. I am new to gnuplot and some detailed advice would be a saviour. Thank you.

How do I specify the **working directory** for **gnuplot** in interactive mode? If I want to call a script with "call 'label_loop.gnu'" and do not want to put the script file in the gnuplot installation folder, do I need to specify the full path each time? I think the following would be the case with normal usage. "I put the data or script I want to load in any directory"-> "I plot it in interactive mode"-> "I want to adjust the position of the label (preferably) with the mouse action"- > "I copy and paste the previous commands and I create a batch file"-> "GnuPlot converts the output to PDF"

I have a small image (*.eps or *.pdf) and want to include it into a gnuplot-generated file (based on regular data). I mean is there any command or trick that would put my external image in like a legend? Using "multiplot" doesn't seem to help; I could not find a good idea in the nice Kawano's site either... Any helpful idea? (Oh, I have gnuplot 4.4 release, and use a 14,04 ubuntu, if this helps...)

> GNU plotfont is a simple utility that will produce a character map for any font available to the GNU plotting utilities graph, plot, pic2plot, and tek2plot, and the GNU libplot graphics library on which they are based. https://www.gnu.org/software/plotutils/manual/en/html_node/plotfont-Examples.html#plotfont-Examples example: plotfont -T hpgl HersheySans Will produce a character map of the HersheySans in HPGL code. The code contains all the characters and they don't seem to be *separated or independant from each other*. How do I get only a specific character HPGL code with plotfont? Is there an other tool that would allow me to do this?

I am using gnuplot and Rust for a project on my Linux Mint (cinnamon) PC. However once I try to display a picture I get:

called Result::unwrap() on an Err value: Couldn't spawn gnuplot. Make sure it is installed and available in PATH.
Cause: No such file or directory (os error 2)

This seems ok as I haven't downloaded Gnuplot. However once i run

sudo apt install gnuplot

I get

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package gnuplot-x11 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

and I have no idea what I should do now. Any help is apreciated, thanks EDIT: I already ran

apt update

and apt policy returns

Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://packages.microsoft.com/repos/code  stable/main armhf Packages
     release o=code stable,a=stable,n=stable,l=code stable,c=main,b=armhf
     origin packages.microsoft.com
 500 http://packages.microsoft.com/repos/code  stable/main arm64 Packages
     release o=code stable,a=stable,n=stable,l=code stable,c=main,b=arm64
     origin packages.microsoft.com
 500 http://packages.microsoft.com/repos/code  stable/main amd64 Packages
     release o=code stable,a=stable,n=stable,l=code stable,c=main,b=amd64
     origin packages.microsoft.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/multiverse i386 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=multiverse,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/multiverse amd64 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=multiverse,b=amd64
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/universe i386 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=universe,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/universe amd64 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=universe,b=amd64
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/restricted i386 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=restricted,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/restricted amd64 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=restricted,b=amd64
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/main i386 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=main,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  jammy-security/main amd64 Packages
     release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=main,b=amd64
     origin security.ubuntu.com
 500 https://mirror.init7.net/linuxmint  vera/backport i386 Packages
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     origin mirror.init7.net
 500 https://mirror.init7.net/linuxmint  vera/backport amd64 Packages
     release v=21.1,o=linuxmint,a=vera,n=vera,l=linuxmint,c=backport,b=amd64
     origin mirror.init7.net
 500 https://mirror.init7.net/linuxmint  vera/import i386 Packages
     release v=21.1,o=linuxmint,a=vera,n=vera,l=linuxmint,c=import,b=i386
     origin mirror.init7.net
 500 https://mirror.init7.net/linuxmint  vera/import amd64 Packages
     release v=21.1,o=linuxmint,a=vera,n=vera,l=linuxmint,c=import,b=amd64
     origin mirror.init7.net
 700 https://mirror.init7.net/linuxmint  vera/upstream i386 Packages
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     origin mirror.init7.net
 700 https://mirror.init7.net/linuxmint  vera/upstream amd64 Packages
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     origin mirror.init7.net
 500 https://mirror.init7.net/linuxmint  vera/main i386 Packages
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     origin mirror.init7.net
 500 https://mirror.init7.net/linuxmint  vera/main amd64 Packages
     release v=21.1,o=linuxmint,a=vera,n=vera,l=linuxmint,c=main,b=amd64
     origin mirror.init7.net
 500 https://dl.google.com/linux/chrome/deb  stable/main amd64 Packages
     release v=1.0,o=Google LLC,a=stable,n=stable,l=Google,c=main,b=amd64
     origin dl.google.com
 500 https://cli.github.com/packages  stable/main amd64 Packages
     release o=gh,n=stable,l=gh,c=main,b=amd64
     origin cli.github.com
 500 http://security.ubuntu.com/ubuntu  focal-security/main i386 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=main,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu  focal-security/main amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=main,b=amd64
     origin security.ubuntu.com
 500 https://apt.kitware.com/ubuntu  focal/main i386 Packages
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     origin apt.kitware.com
 500 https://apt.kitware.com/ubuntu  focal/main amd64 Packages
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     origin apt.kitware.com
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     origin cloud.r-project.org
Pinned packages:
     snapd -> 2.58+22.04.1 with priority -10
     snapd -> 2.58+20.04.1 with priority -10

I have a log file like this: Starting time loop Courant Number mean: 0 max: 0 deltaT = 0.0012 Time = 0.0012 DILUPBiCGStab: Solving for Ux, Initial residual = 1, Final residual = 4.8276e-08, No Iterations 1 DILUPBiCGStab: Solving for Uy, Initial residual = 1, Final residual = 2.23172e-07, No Iterations 1 DILUPBiCGStab: Solving for Uz, Initial residual = 1, Final residual = 2.80701e-08, No Iterations 1 DILUPBiCGStab: Solving for T, Initial residual = 0.999922, Final residual = 4.3295e-07, No Iterations 1 DICPCG: Solving for p_rgh, Initial residual = 1, Final residual = 0.00904671, No Iterations 163 time step continuity errors : sum local = 8.39133e-07, global = -8.63793e-09, cumulative = -8.63793e-09 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00291157, Final residual = 2.1992e-06, No Iterations 1 DILUPBiCGStab: Solving for k, Initial residual = 1, Final residual = 0.00101111, No Iterations 1 ExecutionTime = 2.53 s ClockTime = 3 s Courant Number mean: 0.00447015 max: 0.356735 deltaT = 0.00143547 Time = 0.00263547 DILUPBiCGStab: Solving for Ux, Initial residual = 0.334632, Final residual = 3.26106e-05, No Iterations 1 DILUPBiCGStab: Solving for Uy, Initial residual = 0.325756, Final residual = 1.62512e-05, No Iterations 1 DILUPBiCGStab: Solving for Uz, Initial residual = 0.379719, Final residual = 2.45476e-05, No Iterations 1 DILUPBiCGStab: Solving for T, Initial residual = 0.110323, Final residual = 1.51228e-05, No Iterations 1 DICPCG: Solving for p_rgh, Initial residual = 0.135502, Final residual = 0.00128893, No Iterations 152 time step continuity errors : sum local = 3.78267e-06, global = 5.94272e-08, cumulative = 5.07892e-08 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.0132143, Final residual = 9.90056e-06, No Iterations 1 DILUPBiCGStab: Solving for k, Initial residual = 0.27268, Final residual = 0.000279373, No Iterations 1 ExecutionTime = 3.86 s ClockTime = 4 s and my gnuplot script is like this: set terminal png set output 'res.png' set logscale y set title "Residuals" set ylabel 'Residual' set xlabel 'Time [s]' dt = 0.001 plot "< cat log | grep 'Solving for Ux' | cut -d' ' -f9 | tr -d ','" using ($0*dt):1 title 'Ux' with lines,\ "< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" using ($0*dt):1 title 'Uy' with lines,\ "< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" using ($0*dt):1 title 'Uz' with lines,\ "< cat log | grep 'Solving for T' | cut -d' ' -f9 | tr -d ','" using ($0*dt):1 title 'T' with lines,\ "< cat log | grep 'Solving for p' | cut -d' ' -f9 | tr -d ','" using ($0*dt):1 title 'p' with lines set terminal x11 set output replot pause 1 reread Basically, it grabs the "Solving for Ux", then get the 1st number at "Initial residual" then plot it. Each block (starting from Courant Number mean to Clocktime) is 1 iteration. The real time is iteration * deltaT. So, 1st iteration is 0.0012 sec, 2nd, iteration is 2*0.00143547 = 0.0028 sec....etc. If the deltaT is constant, then I can just set it like the script above and multiply it when plotting, e.g. using ($0*dt):1. Then from above, I just set a single value for dt. However, my deltaT changes so how do we contribute this to the code? I can use the following bash command to get the values for deltaT: cat log | grep -v -e 'ClockTime =' -e 'ExecutionTime = ' -e 'Solving for' -e 'time step' -e 'Courant' -e 'Time' | cut -d' ' -f3 | tr -cd '[:digit:].\n' But I do not know how to set these as variables to plot. I tried: dt = "cat log | grep -v -e 'ClockTime =' -e 'ExecutionTime = ' -e 'Solving for' -e 'time step' -e 'Courant' -e 'Time' | cut -d' ' -f3 | tr -cd '[:digit:].\n'" but couldnt plot it. Gnuplot gave something like "error in piping".

I am using netcat to get a series of points which I would like to plot with gnuplot. However, I am having trouble passing the data to gnuplot without writing it to a file first. In the simplest case, I want to plot a 3-point line that I've defined in a variable first as follows:

#!/bin/bash

DATA="10
12
15"

echo "$DATA"

# Data looks good in terminal (single vertical column of numbers 10, 12, 15)
# However, the following step doesn't work:

gnuplot -persist  tempfile.csv


gnuplot -persist <<-EOFMarker
	plot "tempfile.csv" w lines
EOFMarker

I have this data file (TotalDurationBarPlot.dat):

Indexed list 934
Tree list 3692
Array list 12274
Linked list 48188

What I wish to achieve is a histogram chart with 4 bars: one for **Indexed list**, one for **Tree list**, one for **Array list**, one for **Linked list**. My requirements are: 1. Each bar has it's unique color, 2. On top of each bar, there is a number denoting the height of the bar. (For example, above the **Tree list**, there is **3692**.) 3. It would be nice to have a legend on a light gray background with a thin black legend border at the top right corner. **My current attempt** As of now, my data file looks like:

# ILL TL AL LL
934 3692 12274 48188

... and my gnuplot script looks like:

set title font "Monospaced,13" 'Total duration'
set grid
set key right top
set style data histograms
set style histogram cluster gap 2
set style fill solid border 2
set xtics format ""
set grid ytics
set ylabel "Milliseconds"
set yrange [0:70000]
# set boxwidth 0.5 relative
# set label "Array list\n134908 ms" at graph 0.145,0.9

ArrayListColor   = "#491d75";
IndexedListColor = "#b32929";
LinkedListColor  = "#d49435";
TreeListColor    = "#12520b";

plot 'TotalDurationBarPlot.dat' using 1 title "Indexed list" linecolor rgb IndexedListColor, '' using 2 title "Tree list" linecolor rgb TreeListColor, '' using 3 title "Array list" linecolor rgb ArrayListColor, '' using 4 title "Linked list" linecolor rgb LinkedListColor, '' u 0:1:1 with labels offset -6.0,-100.0 title ""

set terminal png size 650,350 enhanced font "Monospaced,13"
set output 'TotalDuration.png'
replot
exit

It produces: **Edit 1** The gnuplot code provided in the answer by [@meuh](https://unix.stackexchange.com/users/119298/meuh) produces the following plot:

I have the following data that I am processing to get the 1st and 5th column, convert the D format to E format and delete rows that have gibberish numbers such as 9.410-316.

DEG =      1.500
	 2.600D+01     0.000D+00     0.000D+00     0.000D+00     0.000D+00
     2.700D+01     8.720-304     2.369-316     7.556-316     9.410-316
     4.300D+01     1.208D-83     4.156D-96     7.360D-96     6.984D-96
     1.590D+02     8.002D-07     6.555D-19     7.748D-19     7.376D-19
     1.600D+02     1.173D-06     9.669D-19     1.143D-18     1.089D-18
     1.610D+02     1.709D-06     1.417D-18     1.676D-18     1.596D+01
     1.620D+02     2.468D-06     2.058D-18     2.436D-18     2.320D-10
DEG =     18.500 
     2.700D+01     2.794-314     0.000D+00     0.000D+00     0.000D+00
     2.800D+01     4.352-285     1.224-297     3.685-297     4.412-297
     8.800D+01     1.371D-02     6.564D-15     7.852D-15     7.275D-15

My problem is in identifying the number formats that I want to delete. So far, I have tried

-bash
maxa=18.5
maxangle=$(printf "%.3f" $maxa)
if (( $(echo "$maxa 10, else only 5)
else
  txt2search="DEG =     $maxangle"
fi

line=$(grep -n "$txt2search" file  | cut -d : -f 1)

# Once the line number is read for the string, skip a few lines (4) and read next several lines(1000)
beginline=$((line + 4))
endline=$((line + 1002))
awk -v a="$beginline" -v b="$endline" 'NR==a, NR==b {print $1, $5}' fileinput > fileoutput
sed -i 's/D/E/g' fileoutput

Then, to discard the rows with the nonsense numbers, I tried (one at a time) and failed with the following commands.

-bash
sed -ni '/E/p' fileoutput
sed -E '/(E)/!d' fileoutput > spec2.tempdata
sed '/E/!d' fileoutput > spec2.tempdata
awk '!/E/' fileoutput > spec2.tempdata

How can I identify and remove lines with such nonsense numbers? The versions are * sed (GNU sed) 4.7 * grep (GNU grep) 3.4 * GNU Awk 5.0.1, API: 2.0 (GNU MPFR 4.0.2, GNU MP 6.2.0) The output would be

2.600D+01     0.000D+00     0.000D+00     0.000D+00     0.000D+00
4.300D+01     1.208D-83     4.156D-96     7.360D-96     6.984D-96
1.590D+02     8.002D-07     6.555D-19     7.748D-19     7.376D-19
1.600D+02     1.173D-06     9.669D-19     1.143D-18     1.089D-18
1.610D+02     1.709D-06     1.417D-18     1.676D-18     1.596D+01
1.620D+02     2.468D-06     2.058D-18     2.436D-18     2.320D-10

**EDIT:** The solution that I was looking for is (see first comment)

-bash
grep -v '[0-9]-'

E.g. the following command

gnuplot -e "splot [x=-3:3] [y=-3:3] sin(x)*cos(y)"

works perfectly fine on Windows 10 with GNUPLOT 5.4p5. But on my Debian Bullseye box with GNUPLOT 5.4p1 all I get is the following error:

line 0: undefined variable:

Running GNUPLOT without arguments and executing the same command from GNUPLOT command prompt works as expected; a window appears with the plot. Is this some kind of command line parsing issue, or something to do with the character set/locale?

My script takes the data from the third and 5th columns of the input datafile considering only the lines where the value from the 5th column > 0.05, producing a bar graph cat graph.png set term pngcairo size 800,600 set xtics noenhanced set xlabel "Fraction, %" set ylabel "H-bond donor, residue" set key off set style fill solid 0.5 set boxwidth 0.9 plot " 0.05' $file" using 0:5:xtic(3) with boxes EOS I need to modify my gnuplot ploting function to indicate the value corresponded to Y (Frac) above each bar on the plot. I've already tried to add using 1:2 with labels: plot " 0.05' $file" using 0:5:xtic(3) with boxes,\ " 0.05' $file" using 1:2:2 with labels

I am using xmgrace to plot 2D bar plot from the following input data: @ title "H-bonds" @ xaxis label "Donor" @ yaxis label "Frac" @s0 line type 0 @s0 symbol linewidth 1 @s0 symbol fill pattern 1 @s0 symbol fill color 4 @TYPE bar @XAXIS TICK MAJOR 1 GLU_166@N 0.6865 HIE_163@NE2 0.4160 ASN_142@ND2 0.0788 THR_25@OG1 0.0109 as you may see all grace's options have already defined in the @ comments. so to produce the graph I need only to execute gracebat .dat -hdevice PNG -fixed 800 600 -world 0 0 5 1.0 -printfile test.png -hardcopy the problem is that the produced bar graph does not contain any information about the labels from the first columns (like THR_26@OG1 etc), producing something like 1) visualization of the X labels: how could I use the labels on the X from the original data file instead of the values printed on default 1,2,3 etc ? I found the possibility to rename manually the X labels in gui but still have not find the command for batch execution. 2) visualization of the Y labels: would it be possible to plot the values of the fraction (Y) just above each bar directly on the bar graph (now they are indicated only on the Y)?

I want to plot several files just executing a bash script which calls Gnuplot. My idea of a possible bash script is: #!/bin/bash gnuplot plot 'my_first_file.dat' u 1:2 replot 'my_second_file.dat' u 1:2 let us call this bash script gnuplot_script.sh. When I execute this script via $./gnuplot_script.sh I only get gnuplot open in my terminal without the plots related to the script. What should I modify in the script in order to have my data plotted? This is my first time in the world of bash scripting.

Does anyone know whether there is a way to run gnuplot with quadruple arithmetic precision? E.g. When you want to plot a line and you want to subtract a value like "2.3403800935287029218841060098446498" from values that vary only right hand to the 16th digit from this value. Any input on this problem is much appreciated.

I am plotting some financial data in gnuplot as candlesticks. Example of the data:

2022-04-20T00:01:00 1.07907 1.07901 1.07916 1.07907
2022-04-20T00:02:00 1.07906 1.079 1.07908 1.07907
2022-04-20T00:03:00 1.07906 1.07898 1.07909 1.07905
2022-04-20T00:04:00 1.07906 1.07889 1.07906 1.07895
2022-04-20T00:05:00 1.07892 1.07889 1.07901 1.07895
2022-04-20T00:06:00 1.07894 1.07887 1.07894 1.07891
2022-04-20T00:07:00 1.07892 1.07887 1.07895 1.0789
2022-04-20T00:08:00 1.07892 1.07889 1.07904 1.07902
2022-04-20T00:09:00 1.07903 1.07901 1.07909 1.07903
2022-04-20T00:10:00 1.07904 1.079 1.07912 1.07903
2022-04-20T00:11:00 1.07902 1.079 1.07903 1.07902
2022-04-20T00:12:00 1.07903 1.07899 1.07905 1.07901
2022-04-20T00:13:00 1.07903 1.07899 1.07905 1.07902
2022-04-20T00:14:00 1.07901 1.07891 1.07905 1.07895
2022-04-20T00:15:00 1.07893 1.07886 1.07898 1.07887
2022-04-20T00:16:00 1.07888 1.07887 1.07898 1.07893
2022-04-20T00:17:00 1.07892 1.07892 1.07904 1.07901
2022-04-20T00:18:00 1.07902 1.079 1.07905 1.07902

For plotting, I use this script:

set mxtics 10
set mytics 10
set grid mxtics mytics
set xdata time
set timefmt "%Y-%m-%dT%H:%M:%S"
set format x "%H:%M:%S"
plot filename using 1:2:3:4:5 with candlesticks

pause mouse close

I execute gnuplot as follows: gnuplot -e "filename='/tmp/dat'" gnuplot_script.dat This works great, except for the status bar: For the time/date, the status bar just displays a scientific notation of the unix timestamp (I guess). However, I would like to be able to read the specific time when moving the mouse cursor in the plot. Is it possible to change the format?

I was using gnuplot in Ubuntu with wxt terminal, and when I type in plot sin(x), I get an error message: Unable to init server: Could not connect: Connection refused 23:00:40: Error: Unable to initialize GTK+, is DISPLAY set properly? Failed to initialize wxWidgets.

When I use '-' to plot in gnuplot from a pipeline, as follows⭐:

$ seq 5 | gnuplot -e "plot '-' w lp; pause 99"

it works fine, I can adjust the plot's window size, can show/hide grid without any problem. But when I use '/dev/stdin' as follows:

$ seq 5 | gnuplot -e "plot '/dev/stdin' w lp; pause 99"

It shows the plot but when I click to maximize the window, it crashes:

line 0: warning: Skipping data file with no valid points

plot '/dev/stdin' w lp
                      ^
line 0: x range is invalid

Could you please explain why does this happen? what is the difference between '-' and '/dev/stdin'? ------- ⭐ I am deliberately using pause instead of using -p option, because the latter doesn't allow interaction with the plot (no update after resize, can't show/hide grid from the toolbar,etc.)
👉️ I am using bash version 5.0.17 on Ubuntu 20.04, gnuplot 5.2 patchlevel 8, if that info is needed.

I am trying to plot some data using gnuplot My input is similar to

$ go run . | tail
410ms-420ms 14260
420ms-430ms 13654
430ms-440ms 13344
440ms-450ms 13156
450ms-460ms 12829
460ms-470ms 12463
470ms-480ms 12883
480ms-490ms 12100
490ms-500ms 11902
500ms-510ms 11643

The length of the dataset is 51 My command is

go run . | gnuplot -p -e 'set style d hist; set style fill solid; plot "-" u 2:xtic(1) linecolor 'black'   title "Counts by duration"'

My program, for those who have the Go language available is https://play.golang.org/p/DAIEY1YZ7LT My output is like How can i improve the display so it is readable by an human ? Is it possible to show only a subsets of labels in the x axis ? Can the bottom indicator of pointer x y positions show the label instead of x value ?

I am using ns2.35 and ubuntu 18.040. I have a number of trace files and I want to compare them in terms of: delay, throughput, power consumption (awk files) .. I would like to use xgraph or gnuplot .. Is there an easy way to use them to compare a number of trace files at once?

code:

#!/usr/bin/env bash
# download death data
wget -O Deaths.txt http://www.randomservices.org/random/data/Deaths.txt 
wget -O Pumps.txt http://www.randomservices.org/random/data/Pumps.txt 
# Delete the first line
sed 1d Deaths.txt > tempfile1
sed 1d Pumps.txt > tempfile2
# mv tempfile1 Deaths.txt
# mv tempfile2 Pumps.txt
gnuplot -persist -e "set terminal canvas;set xlabel 'x' font 'sans,15';
set ylabel 'y' font ',15';
set title 'Relationship between Deaths and Pumps' font 'sans, 20';
show title;
set label "Most of the deaths is near the pump located in 12.6,11.7" at 16,16;
show label;
set output 'death_pump_relation.html';
plot 'Pumps.txt' with points pt 7 ,'Deaths.txt' with dots;"

There is a error:

line 0: unexpected or unrecognized token

and I cannot get any output But in fact, there is no line0 in my script What is wrong with that? Version : gnuplot V5.2 System: MacOS