procedure coltab

Initialises a colour table for a "grey-scale" map.

Syntax
coltab RGB,NCOL,ALFA,IC1,IC2

Arguments

ARGUMENT    TYPE I/O DIMENSION DESCRIPTION

RGB:   R*4 I 3 X NCOL Red, green and blue intenisty for

   the colour table.

NCOL:   I*4 I - No. of colours in the input table.

ALFA:   R*4 I - Contrast-factor (linear=1).

IC1,IC2:   I*4 I - Lowest & highest colour-index to be

   used for the output.

ARGUMENT	TYPE I/O DIMENSION DESCRIPTION
RGB:	R*4 I 3 X NCOL Red, green and blue intenisty for
	the colour table.
NCOL:	I*4 I - No. of colours in the input table.
ALFA:	R*4 I - Contrast-factor (linear=1).
IC1,IC2:	I*4 I - Lowest & highest colour-index to be
	used for the output.