aqp (version 1.18)

huePosition: Munsell Hue Position for Soil Color Description

Description

Munsell hues are typically arranged from 5R to 5PB in Munsell soil color books. This function matches a vector of Munsell hues to the position in this arrangement of 29 hues.

Usage

huePosition(x, returnHues=FALSE)

Arguments

x

character vector of hues, e.g. '10YR'

returnHues

logical, should the unique set of Munsell hues used for ordering be returned? See details.

Value

A vector of integer hue positions is typically returned, of the same length and order as x. If returnHues is TRUE, then the hue names and ordering is returned and x is ignored.

Details

This function is fully vectorized.

References

https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ref/?cid=nrcs142p2_053569

See Also

colorContrast

Examples

# NOT RUN {
# get hue ordering for setting levels of a factor
huePosition(x=NULL, returnHues=TRUE)

# get position of the '10YR' hue (7)
huePosition(x='10YR')
# }