x		y
			①	②	③	④	⑤	⑥	⑦

#
# Example of transparent fill areas
# Ethan A Merritt - Aug 2006
# NB:
#    Not all terminal types support transparency
#    Assumes UTF-8 support for plot titles
#
save_encoding = GPVAL_ENCODING
set encoding utf8
set style fill solid 1.0 noborder
set style function filledcurves y1=0

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.)

set xrange [-5:5]
set yrange [0:1]

unset colorbox

set key title "Gaussian Distribution"
set key top left Left reverse samplen 1

#set obj 1 rect from graph 0,0 to graph 1,1
#set obj 1 rect back fs solid 0.25 fc lt 4

set title "Solid filled curves"
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"


Click here for minimal script to generate this plot

x		y
			①	②	③	④	⑤	⑥	⑦

set style fill transparent solid 0.5 noborder
set title "Transparent filled curves"
replot


Click here for minimal script to generate this plot

x		y
			①	②	③	④	⑤	⑥	⑦

set style fill pattern 4 bo
set title "Pattern-filled curves"
replot


Click here for minimal script to generate this plot

x		y
			①	②	③	④	⑤	⑥	⑦

set style fill transparent pattern 4 bo
set title "Transparent pattern-filled curves"
replot


Click here for minimal script to generate this plot