NADA: splitQual – R documentation

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splitQual

Split character qualifiers and numeric values from qualified data

Description

splitQual extracts qualified and unqualified vectors from a character vector containing concatenated numeric and qualifying characters.

Typically used to split “less-thans" in qualifier-numeric concatenations like “<0.5".

Usage

splitQual(v, qual.symbol= "<")

Arguments

`v`	A character vector.
`qual.symbol`	The qualifier symbol to split from the characters in v. Defaults to “<".

Value

splitQual returns a list of three vectors.

`qual`	A numeric vector of values associated with qualified input.
`unqual`	A numeric vector of values associated with unqualified input
`qual.index`	Indexes of qualified values (ie., where qual.symbol was matched)
`unqual.index`	Indexes of unqualified values (ie., where qual.symbol was not matched)

Author(s)

R. Lopaka Lee <rclee@usgs.gov>

Dennis Helsel <dhelsel@practicalstats.com>

References

Lee and Helsel (2005), Statistical analysis of environmental data containing multiple detection limits: S-language software for regression on order statistics, Computers in Geoscience vol. 31, pp. 1241-1248

Examples

v = c('<1', 1, '<1', 1, 2)
    splitQual(v)

NADA

Nondetects and Data Analysis for Environmental Data

v1.6-1.1

GPL (>= 2)

Authors

Lopaka Lee

Initial release