if [[ ! -s plot.gp ]]; then return; fi
if [ -z "$OPT_NO_X11" ]; then
echo "set terminal x11 enhanced; $(< plot.gp)" | gnuplot -persist
if [[ ! -s plot.gp ]]; then return; fi
if [ -z "$OPT_NO_X11" ]; then
echo "set terminal x11 enhanced; $(< plot.gp)" | gnuplot -persist