clamp function

Clamp values

Clamp values to a minimum and maximum value. That is, all values below the lower clamp value and above the upper clamp value become NA (or the lower/upper value if useValue=TRUE)

## S4 method for signature 'Raster'
clamp(x, lower=-Inf, upper=Inf, useValues=TRUE, filename="", ...)
## S4 method for signature 'numeric'
clamp(x, lower=-Inf, upper=Inf, ...)

Arguments

• x: RasterLayer, or numeric vector
• lower: numeric. lowest value
• upper: numeric. highest value
• useValues: logical. If FALSE values outside the clamping range become NA, if TRUE, they get the extreme values
• filename: character. Filename for the output RasterLayer (optional)
• ...: additional arguments as for writeRaster

Returns

Raster object

See Also

reclassify

Examples

r <- raster(ncols=12, nrows=12)
values(r) <- 1:ncell(r)
rc <- clamp(r, 25, 75) 
rc