#!/usr/local/bin/gnuplot -persist set term png set out "/dev/null" set out '2011-xpo.png' plot "2011-xpo" using 1:2: (0.3) title "2010" w boxes fs pattern 1, \ "2011-xpo" using ($1+0.3):3: (0.3) title "2011" w boxes fs solid 0.7