OPEN-WITH-GNUPLOT

sudo apt install nautilus-scripts-manager

paste the "open-with-gnuplot" file in ~/.local/share/nautilus/scripts/

chmod u+x open-with-gnuplot

Then right clicking your input file and going to "Script" option you will get "open-with-gnuplot" option




save the text as  open-with-gnuplot


#!/bin/bash
IFS=$'\n'
for FILE in $NAUTILUS_SCRIPT_SELECTED_FILE_PATHS; do
echo
    gnuplot <<- EOF
reset
set notitle
set term pngcairo
        set output "${FILE}.png"
        plot "${FILE}" w l lw 2 lc "blue" notitle
EOF
done