Re: palette plus extra color?

[Ethan M. <eam...@gm...>]

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