raster: unique – R documentation

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unique

Unique values

Description

This function returns the unique values in a RasterLayer object or the unique combinations of the layers in a multilayer object.

Usage

## S4 method for signature 'RasterLayer,missing'
unique(x, incomparables=FALSE, na.last=NA, progress="", ...) 

## S4 method for signature 'RasterStackBrick,missing'
unique(x, incomparables=FALSE, na.last=NA, progress="", ...)

Arguments

`x`	Raster object
`incomparables`	must be missing. The default value `FALSE` is used. See `unique`
`na.last`	logical. for controlling the treatment of `NA`s. If `TRUE`, missing values in the data are put last; if `FALSE`, they are put first; if `NA`, they are removed.
`progress`	character. Use "text" or "window" for a progress indicator
`...`	additional arguments. as in `unique`

Value

vector or matrix

Examples

r <- raster(ncol=10, nrow=10)
values(r) <- round(runif(ncell(r))*10)
unique(r)
unique(stack(r, round(r/2)))

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