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#!/bin/bash
[ $# -eq 0 ] || {
echo 'unexpected command line arguments'
echo 'usage: $0'
echo 'Expects a stream on the standard input and draws'
echo 'gnuplot graphs when it recognizes some gnuplot data'
exit 1
}
trap cleanup EXIT SIGINT
cleanup() {
rm -f "$tmp"
}
tmp="$(mktemp)"
while read line; do
case "$line" in
'#'*)
# reading blocks of line starting with a line
# starting with a sharp and ending with an empty line
# this line has format #title size\tname1\tname2 etc.
names=$(echo "$line" | cut -d ' ' -f 2-)
title=$(echo "$line" | sed 's/^#\([^ ]*\) .*$/\1/')
> "$tmp" # emptying the file
while read line && [ "$line" != "" ]; do
echo "$line" >> "$tmp"
done
gnuplot -p <(
echo set key left top
echo set logscale x
echo set title "'$title'"
echo -n 'plot '
counter=1
for name in $names; do
counter=$((counter+1))
if [ $counter -ne 2 ]; then
echo -e -n ', \\\n '
fi
echo -n \'"$tmp"\' using 1:$counter title \'"$name"\' with linespoints
done
echo
)
esac
done
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