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

Value

Raster object

See also

reclassify

Examples

r <- raster(ncols=12, nrows=12)
values(r) <- 1:ncell(r)
rc <- clamp(r, 25, 75) 
rc
#> class      : RasterLayer 
#> dimensions : 12, 12, 144  (nrow, ncol, ncell)
#> resolution : 30, 15  (x, y)
#> extent     : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
#> crs        : +proj=longlat +datum=WGS84 +no_defs 
#> source     : memory
#> names      : layer 
#> values     : 25, 75  (min, max)
#>