openair (version 0.3-13)

openColours: openair colours

Description

Pre-defined openair colours and definition of user-defined colours

Usage

openColours(scheme = "default", n = 100)

Arguments

scheme

The pre-defined schemes are "increment", "default", "brewer1", "heat", "jet", "hue".

n

The number of colours to be returned.

Value

• Returns colour values - see examples below.

Details

This in primarily an internal openair function to make it easy for users to select particular colour schemes, or define their own range of colours of a user-defined length. Each of the pre-defined schemes have merits and their use will depend on a particular situation. For showing incrementing concentrations e.g. high concentrations emphasised, then "default", "heat", "jet" and "increment" are very useful. To colour-code categorical-type problems e.g. colours for different pollutants, "hue" and "brewer1" are useful. Failing that, the user can define their own schemes based on R colour names. To see the full list of names, type colors() into R.

References

~put references to the literature/web site here ~

Examples

# to return 5 colours from the "jet" scheme:
cols <- openColours("jet", 5)
cols

# to interpolate between named colours e.g. 10 colours from yellow to
#  green to red:
cols <- openColours(c("yellow", "green", "red"), 10)
cols