setValues: Set the values of raster cells or of geometry attributes

In rspatial/terra: Spatial Data Analysis

Set the values of raster cells or of geometry attributes

Description

Set cell values of a SpatRaster or the attributes of a SpatVector. For large SpatRasters use init instead to set values.

Usage

## S4 replacement method for signature 'SpatRaster,ANY'
values(x)<-value

## S4 method for signature 'SpatRaster,ANY'
setValues(x, values, keeptime=TRUE, keepunits=TRUE, keepnames=FALSE, props=FALSE)

## S4 replacement method for signature 'SpatVector,ANY'
values(x)<-value

Arguments

x	SpatRaster or SpatVector
value	For SpatRaster: numeric, matrix or data.frame. The length of the numeric values must match the total number of cells (ncell(x) * nlyr(x)), or be a single value. The number of columns of the matrix or data.frame must match the number of layers of x, and the number of rows must match the number of cells of x. It is also possible to use a matrix with the same number of rows as x and the number of columns that matches ncol(x) * nlyr(x). For SpatVector: data.frame, matrix, vector, or NULL
values	Same as for value
keeptime	logical. If TRUE the time stamps are kept
keepunits	logical. If FALSE the units are discarded
keepnames	logical. If FALSE the layer names are replaced by the column names in y (if present)
props	logical. If TRUE the properties (categories and color-table) are kept

Value

The same object type as x

See Also

values, init

Examples

f <- system.file("ex/elev.tif", package="terra")
r <- rast(f)
x <- setValues(r, 1:ncell(r))
x
values(x) <- runif(ncell(x))
x
head(x)

f <- system.file("ex/lux.shp", package="terra")
v <- vect(f)
values(v) <- data.frame(ID=1:12, name=letters[1:12])
head(v)

rspatial/terra documentation built on Nov. 5, 2024, 5:13 p.m.