#plotting on screen
set xlabel "x"
set ylabel "y"
set grid xtics ytics

# plot "filename" using columns 1 & 2 labelling graph "graph" 
# gnuplot will thus interpret the first column as x coordinates, the second one as y coordinates
plot "graph.xy" using 1:2 title 'graph' 

# plot to postscript file 
set out "graph.ps"
set size 1.0, 0.5
set terminal postscript portrait enhanced "Helvetica" 14
replot