>>>>>> rename it gnuplot.sh   make it executable <<<<<
	>>>>>>		and remove these lines 		 <<<<<
#!/bin/sh
##	general purpose string replacement in a template file
##	used in gplot and in Makefile for gnuplot on the fly
# Written by Philip J. Mucci

usage()
{
    echo "Usage: $0 <template> <output> [<tag> <value>]"
    exit 1;
}

if [ $# -lt 2 ]; then
    usage;
fi
if [ ! -r $1 ]; then
    usage;
fi

in="$1";
out="$2";
tmpin="/tmp/$$";
cp $in $tmpin;
shift 2;

while [ $# -ne 0 ]; do
    sed -e "s:$1:$2:g" < $tmpin > $out
    cp $out $tmpin
    shift 2;
done