#Function plot: double y axis
set terminal png size 400, 300
set output 'plot.png'
set xrange [-10:10]
set yrange [-1:5]
set y2range [-1:3]
set ylabel "f(x)"
set y2label "g(x)"
set title "double y axis plot"
set xtics -10, 2, 10
set ytics -1, 1, 5
set y2tics -1, 1, 5
plot  x**2 axis x1y1 w p title 'f(x)', exp(-x**2/2) axis x1y2 w lp title 'gf(x)'