aqp: huePosition – R documentation

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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.

Details

This function is fully vectorized.

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.

Author(s)

D.E. Beaudette

References

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

Examples

# get hue ordering for setting levels of a factor
huePosition(x=NULL, returnHues=TRUE)

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

aqp

Algorithms for Quantitative Pedology

v1.29

GPL (>= 3)

Authors

Dylan Beaudette [aut, cre], Pierre Roudier [aut, ctb], Andrew Brown [aut, ctb]

Initial release

2021-04-05