#!/bin/bash
# plod - plot data using gnuplot

: ${w:=640} ${h:=480}
: ${pause:=sleep 1e9}
: ${using:=1:2}
: ${title:=}
: ${style:=lines}

if [ -n "$x0" -a -n "$x1" ]; then
    xrange="set xrange[$x0:$x1];"
fi
if [ -n "$y0" -a -n "$y1" ]; then
    yrange="set yrange[$y0:$y1];"
fi

if [ -n "$dx" ]; then
    xtics="set xtics $dx;"
fi
if [ -n "$dy" ]; then
    ytics="set ytics $dy;"
fi

if [ -z "$terminal" ]; then
    if [ -t 1 ]; then
        terminal="x11"
        gnuplot_opts="$gnuplot_opts -geometry ${w}x${h}"
    else
        terminal="png size $w,$h"
        pause=
    fi
fi

(
echo "
    set terminal $terminal;
    $xrange $yrange
    $xtics $ytics
#    bind Close 'exit gnuplot';
    plot '-' using $using title '$title' with $style;
" # | tee /dev/stderr
cat
echo 'e'
$pause
) |
gnuplot $gnuplot_opts