raster: cv – R documentation

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cv

Coefficient of variation

Description

Compute the coefficient of variation (expressed as a percentage). If there is only a single value, sd is NA and cv returns NA if aszero=FALSE (the default). However, if (aszero=TRUE), cv returns 0.

Usage

## S4 method for signature 'ANY'
cv(x, ..., aszero=FALSE, na.rm = FALSE)

## S4 method for signature 'Raster'
cv(x, ..., aszero=FALSE, na.rm = FALSE)

Arguments

`x`	A vector of numbers (typically integers for modal), or a Raster* object
`...`	additional (vectors of) numbers, or Raster objects
`aszero`	logical. If `TRUE`, a zero is returned (rather than an NA) if the cv of single value is computed
`na.rm`	Remove (ignore) NA values

Value

vector or RasterLayer

Examples

data <- c(0,1,2,3,3,3,3,4,4,4,5,5,6,7,7,8,9,NA)
cv(data, na.rm=TRUE)

raster

Geographic Data Analysis and Modeling

v3.4-10

GPL (>= 3)

Authors

Robert J. Hijmans [cre, aut] (<https://orcid.org/0000-0001-5872-2872>), Jacob van Etten [ctb], Michael Sumner [ctb], Joe Cheng [ctb], Dan Baston [ctb], Andrew Bevan [ctb], Roger Bivand [ctb], Lorenzo Busetto [ctb], Mort Canty [ctb], Ben Fasoli [ctb], David Forrest [ctb], Aniruddha Ghosh [ctb], Duncan Golicher [ctb], Josh Gray [ctb], Jonathan A. Greenberg [ctb], Paul Hiemstra [ctb], Kassel Hingee [ctb], Institute for Mathematics Applied Geosciences [cph], Charles Karney [ctb], Matteo Mattiuzzi [ctb], Steven Mosher [ctb], Babak Naimi [ctb], Jakub Nowosad [ctb], Edzer Pebesma [ctb], Oscar Perpinan Lamigueiro [ctb], Etienne B. Racine [ctb], Barry Rowlingson [ctb], Ashton Shortridge [ctb], Bill Venables [ctb], Rafael Wueest [ctb]

Initial release

2021-05-02

cv