Bash script for plotting with gnuplot

Question

Hy guys! I have problems with writing bash script to run 50 times my script which generates data files and then plot it to file. I wrote smth like this, but it doesnt work

#!/bin/bash
for i in {1..50}
do
    ./ampl ampltst1 # generates different res.txt file each time
    /usr/bin/gnuplot <<\__EOF
    set xrange [-2:2]
    set yrange [-2:2]
    set term png
    set output "image-${i}.png"
    plot "res.txt" u 1:2 w lines, "res.txt" u 3:4 w lines, "res.txt" u 5:6 w li$
    pause -1
    __EOF
done

Please help me to fix this script!

Answer 1

Possibly you have problems with indentation: __EOF must be without any leading spaces:

...
    /usr/bin/gnuplot <<\__EOF
    set xrange [-2:2]
    ...
__EOF
done

Also \ symbol is not required.

Also content of HERE-IS-DOCUMENT will be indented. Is that OK for gnuplot?

If no, you must remove indentation:

for i in {1..50}
do
    ./ampl ampltst1 # generates different res.txt file each time
    /usr/bin/gnuplot <<__EOF
set xrange [-2:2]
set yrange [-2:2]
set term png
set output "image-${i}.png"
plot "res.txt" u 1:2 w lines, "res.txt" u 3:4 w lines, "res.txt" u 5:6 w li$
pause -1
__EOF
done