aqp: hurst.redness – R documentation

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hurst.redness

Hurst (1977) Redness Index

Description

Calculate Redness Index after Hurst (1977) "Visual estimation of iron in saprolite" DOI: 10.1130/0016-7606(1977)88<174:VEOIIS>2.0.CO;2. Accepts vectorized inputs for hue, value and chroma, produces vector output.

Usage

hurst.redness(hue, value, chroma)

Arguments

`hue`	A character vector containing Munsell hues (e.g. "7.5YR")
`value`	A numeric vector containing Munsell values
`chroma`	A numeric vector containing Munsell chromas

Value

A numeric vector of horizon redness index (lower values = redder).

Author(s)

Andrew G. Brown.

References

Hurst, V.J. (1977) Visual estimation of iron in saprolite. GSA Bulletin. 88(2): 174–176. doi: https://doi.org/10.1130/0016-7606(1977)88<174:VEOIIS>2.0.CO;2

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