unique function

Unique values

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

## 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 NAs. 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

See Also

unique

Returns

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)))