saving gnuplot figure without displaying the plot

I have a data file (data.txt). I can plot the data with using gnup command. Like;

gnup -p data.txt -xl 'Hours' -yl 'Data (m)'

I need to save the plot (for example png format) after executing above command without plotting the data. Is that possible?

5

1 Answer

gnuplot has a set output command that I use to save a copy of my plot:

#!/bin/bash
# Run this script after synching the Palm with $HOME/Visor/.last
# Weight - extract my weight data fron the Visor, clean it
# up, and feed it to gnuplot
target=$HOME/Visor/var/Weight
visorhome="$HOME/Visor"
gnuplotdata="${target}.pltdata"
gnuplotout="${target}.ps"
# ... data prep omitted - data to plot is in $gnuplotdata
gnuplot <<EOF
set title "Weight and running average, in kilograms, for Walt Sullivan"
set timefmt "%y/%m/%d"
set xdata time
set format x "%y/%m/%d"
plot "$gnuplotdata" using 1:2 with linespoints, "" using 1:3 with linespoints;
pause 10 "Plot will close in 10 seconds, see $gnuplotout"
set terminal postscript enhanced color landscape
set output "$gnuplotout"
replot
EOF
exit 0

To learn more, type:

$ gnuplot
gnuplot> help set output By default, screens are displayed to the standard output. The `set output` command redirects the display to the specified file or device.
...

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