#! /bin/bash
# Last edited on 2014-01-17 02:53:09 by stolfilocal

hfile="$1"; shift # Name of pair histogram file.

gnuplot << EOF

splot "${hfile}" using (0.5*(column(3)+column(4))):(0.5*(column(5)+column(6))):7 notitle with lines
pause mouse close
quit
EOF