Extract or Assign Colour Values in a Colour Map
Extract the colour values in a colour map, or assign new colour values.
colouroutputs(x) colouroutputs(x) <- value
x |
A colour map (object of class |
value |
A vector of values that can be interpreted as colours. |
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.
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").
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.
m <- colourmap(rainbow(5), range=c(0,1)) m # reverse order of colours colouroutputs(m) <- rev(colouroutputs(m)) m
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