/usr/share/radiance/meta/function.plt is in radiance-materials 4R1+20120125-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | #
# This plot is tailored to functions.
#
include = line.plt # start from a line plot
xmin = 0
xmax = 1
npoints = 100
Anpoints = npoints
Bnpoints = npoints
Cnpoints = npoints
Dnpoints = npoints
Enpoints = npoints
Fnpoints = npoints
Gnpoints = npoints
Hnpoints = npoints
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