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.
interp.colourmap(m, n = 512)
- A colour map (object of class
- Number of colour steps to be created in the new colour map.
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
m <- colourmap(y, inputs=x)
to create a colourmap that represents this simple
mapping. Then apply
to obtain a smooth transition between these points.
- Another colour map (object of class
co <- colourmap(inputs=c(0, 0.5, 1), c("black", "red", "white")) plot(interp.colourmap(co))