fragmentClasses {aqp} | R Documentation |
Coarse Fragment Class Labels and Diameter
Description
This is a convenience function for accessing coarse fragment class labels and associated diameter (mm), as defined in various classification systems such as USDA, Unified, and AASHTO.
Usage
fragmentClasses(
sys = c("usda_simplified", "usda", "international", "unified", "aashto",
"mod.wentworth"),
flat = FALSE,
rounded = FALSE
)
Arguments
sys |
character, length 1. This is an abbreviated name used to select class labels and fragment diameter. |
flat |
logical. Fragments are flat, only used by USDA systems. |
rounded |
logical. Fragments are rounded, only used by AASHTO system. |
Value
named vector of fragment diameter in mm
References
Schoeneberger, P.J., D.A. Wysocki, E.C. Benham, and Soil Survey Staff. 2012. Field book for describing and sampling soils, Version 3.0. Natural Resources Conservation Service, National Soil Survey Center, Lincoln, NE.
See Also
Examples
# use default system: "usda_simplified"
fragmentClasses()
fragmentClasses(flat = TRUE)
fragmentClasses(sys = 'usda')
fragmentClasses(sys = 'USDA', flat = TRUE)
fragmentClasses(sys = 'international')
fragmentClasses(sys = 'unified')
fragmentClasses(sys = 'aashto')
fragmentClasses(sys = 'aashto', rounded = TRUE)
fragmentClasses(sys = 'mod.wentworth')
[Package aqp version 2.0.4 Index]