interp.colourmap
From spatstat v1.36-0
by Adrian Baddeley
Interpolate smoothly between specified colours
Given a colourmap object which maps numbers to colours, this function interpolates smoothly between the colours, yielding a new colour map.
Usage
interp.colourmap(m, n = 512)
Arguments
- m
- A colour map (object of class
"colourmap"
). - n
- Number of colour steps to be created in the new colour map.
Details
Given a colourmap object m
, which maps numerical values to
colours, this function interpolates the mapping,
yielding a new colour map.
This makes it easy to build a colour map that
has smooth gradation between different colours or shades.
First specify a small vector of numbers x
which should be mapped to
specific colours y
. Use m <- colourmap(y, inputs=x)
to create a colourmap that represents this simple
mapping. Then apply interp.colourmap(m)
to obtain a smooth transition between these points.
Value
- Another colour map (object of class
"colourmap"
).
See Also
Examples
co <- colourmap(inputs=c(0, 0.5, 1), c("black", "red", "white"))
plot(interp.colourmap(co))
Community examples
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