The fill color of a object can not be set to be gradient in gnuplot. So the method in simple background color can not be copied, at least can not be copied directly. But if we draw a set
of small rectangles with different color, it may have the same appearence as a large rectangle with linear gradient color. Now let us realize this idea.
And the above commands produce the following graph:
reset n=200 #number of rectangles dx=1.0/n #legth of rectangle set palette defined(0"white",n"#ccffcc") #set gradient color set cbrange [0:n] unset colorbox set for [i=1:n] object i rectangle from screen (i-1)*dx,0 to \ screen i*dx+dx/2,1 fs solid 1.0 noborder fillcolor palette cb i \ behind #draw a set of rectangle with diffrent color."+dx/2" makes the #adjacent rectangles have a common part, so that the border is not #so obvious set term png set output "backgradient1.png" plot sin(x) w l lw 0 lc palette cb 0 notitle,sin(x) w l lw 2 lc \ rgb"blue" notitle #The first plot is just used to enable the palette, and it will be #covered by the second plot never appearing on the output picture. set output
|Linear gradient colored background|