cv function

Coefficient of variation

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.

## 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

Returns

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)