As of version 4.4, gnuplot supports transparency, which allows us to create attractive and sophisticated effects by setting the opacity of colors in various contexts. This technique is most useful when drawing with styles such as
filledcurves using areas of solid color:
The following script will produce the previous figure:
set term svg set out 'file.svg' set style fill transparent solid 0.3 plot [0:pi] sin(x)**2 with filledcurves above y1=0 lc rgb '#00ffff',\ 0.75*cos(2*x)**2 with filledcurves above y1=0 lc rgb '#aa00aa'
We have included an explicit
set term command in this recipe because transparency ...