|
From: Ethan M. <eam...@gm...> - 2020-06-13 19:09:26
|
On Saturday, 13 June 2020 12:07:02 PDT Ethan A Merritt wrote:
> On Saturday, 13 June 2020 11:25:46 PDT Allin Cottrell wrote:
> > The following doesn't work (not surprising) but I'm wondering if
> > there's any real gnuplot syntax that'll do what it's trying to do:
> >
> > plot for [i=0:*] 'polygons.dat' index i with filledcurves \
> > fc ($3 < 0 ? 'gray' : palette)
> >
> > The datafile contains several datasets representing polygons; the
> > first 2 columns hold the coordinates of vertices and the third a
> > value to be colorized (if >= 0) or shown as missing (gray) if
> > negative.
>
> Define the palette such that cb=0 is gray, the rest whatever you want.
>
> set palette defined (-0.001 "gray", 0 "first palette color", ..., 1 "last palette color")
> set cbrange [0:*]
Ah, sorry. I missed the normal color for ( >= 0) requirement.
set cbrange [-0.001:*]
Ethan
|