# set terminal pngcairo  transparent enhanced font "arial,8" fontscale 1.0 size 512, 280 
# set output 'transparent.1.png'
set style fill   solid 1.00 noborder
set key title "Gaussian Distribution" enhanced   center
set key fixed left top vertical Left reverse enhanced autotitle nobox
set key noinvert samplen 1 spacing 1 width 0 height 0
set style data lines
set style function filledcurves y1=0
set title "Solid filled curves" 
set xrange [ -5.00000 : 5.00000 ] noreverse
set yrange [ 0.00000 : 1.00000 ] noreverse
unset colorbox
Gauss(x,mu,sigma) = 1./(sigma*sqrt(2*pi)) * exp( -(x-mu)**2 / (2*sigma**2) )
d1(x) = Gauss(x, 0.5, 0.5)
d2(x) = Gauss(x,  2.,  1.)
d3(x) = Gauss(x, -1.,  2.)
NO_ANIMATION = 1
save_encoding = "utf8"
plot d1(x) fs solid 1.0 lc rgb "forest-green" title "μ =  0.5 σ = 0.5",      d2(x) lc rgb "gold" title "μ =  2.0 σ = 1.0",      d3(x) lc rgb "dark-violet" title "μ = -1.0 σ = 2.0"