!
! -- user_function_plot.gle example of plotting a user defined function
!
size 10 10
set font texcmr
set hei 0.5
amove 0 0
sub my_function x b c
    return b*sin(2*pi*x/c)
end sub
begin graph
    scale auto
    let d1 = 3*x^2+x^3 from -5 to 5 nsteps 1000
    d1 line color GREEN lwidth 0.05 key "3x^2+x^3"
    let d2 = my_function(x,50,3) from -5 to 5 nsteps 1000
    d2 line color BLUE lwidth 0.03 key "sine wave"
    xtitle "foo"
    ytitle "bar"
end graph