pm3d & user defined color

set term postscript eps color enhanced

set out 'ARPES.eps'

rgb(x)=int(x*256)

set nokey

set xr[0:0.9]

set yr[-1.6:0.3]

set size ratio 1.5

set ytics out nomirror

set xtics out nomirror

set pm3d map

splot 'ARPES.dat' u 1:2:(0.0):(rgb($3)) with p pt 5 ps 0.5 lc rgb variable

## (0.0) in "u 1:2:(0.0):(rgb($3))" is dummy, but need to use splot.

## with this command, gnuplot draw point at x (from column 1), y (column 2)

## and 0.0 (as a z-value) with points of which color are defined by rgb($3).