clamp: Clamp values

In raster: Geographic Data Analysis and Modeling

Description

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)

Usage

## 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

Value

Raster object

See Also

reclassify

Examples

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

Example output

Loading required package: sp
class       : RasterLayer 
dimensions  : 12, 12, 144  (nrow, ncol, ncell)
resolution  : 30, 15  (x, y)
extent      : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
coord. ref. : +proj=longlat +datum=WGS84 
data source : in memory
names       : layer 
values      : 25, 75  (min, max)

raster documentation built on Jan. 5, 2021, 3:01 a.m.