colouroutputs {spatstat.geom} | R Documentation |
Extract or Assign Colour Values in a Colour Map
Description
Extract the colour values in a colour map, or assign new colour values.
Usage
colouroutputs(x)
colouroutputs(x) <- value
Arguments
x |
A colour map (object of class |
value |
A vector of values that can be interpreted as colours. |
Details
An object of class "colourmap"
is effectively a function that
maps its inputs (numbers or factor levels) to colour values.
The command colouroutputs(x)
extracts the colour values
in the colour map x
.
The assignment colouroutputs(x) <- value
replaces the colour
values in the colour map x
by the entries in
value
. The replacement vector value
should have the
same length as colouroutputs(x)
, and its entries should be
interpretable as colours.
To change only some of the colour values in a colour map,
it may be easier to use tweak.colourmap
.
Value
The result of colouroutputs
is a character vector of
colour values. The result of the assignment
colouroutputs(x) <- value
is
another colour map (object of class "colourmap"
).
Author(s)
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner rolfturner@posteo.net and Ege Rubak rubak@math.aau.dk.
See Also
colourmap
,
interp.colourmap
,
tweak.colourmap
,
colourtools
.
Examples
m <- colourmap(rainbow(5), range=c(0,1))
m
# reverse order of colours
colouroutputs(m) <- rev(colouroutputs(m))
m