inplace function

Change values in-place

These "in-place" replacement methods assign new value to an object without making a copy. That is efficient, but if there is a copy of the object that you made by standard assignment (e.g. with y <- x), that copy is also changed.

set.names is the in-place replacement version of names<-.

set.ext is the in-place replacement version of ext<-

set.values is the in-place replacement version of [<-.

set.cats is the in-place replacement version of categories

set.crs is the in-place replacement version of crs<-

set.window is the in-place replacement version of window<-

## S4 method for signature 'SpatRaster'
set.names(x, value, index=1:nlyr(x), validate=FALSE)
## S4 method for signature 'SpatRasterDataset'
set.names(x, value, index=1:length(x), validate=FALSE)
## S4 method for signature 'SpatVector'
set.names(x, value, index=1:ncol(x), validate=FALSE)

## S4 method for signature 'SpatRaster'
set.ext(x, value)
## S4 method for signature 'SpatVector'
set.ext(x, value)

## S4 method for signature 'SpatRaster'
set.crs(x, value)
## S4 method for signature 'SpatVector'
set.crs(x, value)

## S4 method for signature 'SpatRaster'
set.values(x, cells, values, layer=0)
## S4 method for signature 'SpatRasterDataset'
set.values(x)

## S4 method for signature 'SpatRaster'
set.cats(x, layer=1, value, active=1)

## S4 method for signature 'SpatRaster'
set.RGB(x, value, type="rgb")

Arguments

• x: SpatRaster
• value: character for set.names. For set.cats: a data.frame with columns (value, category) or vector with category names. For set.RGB 3 or 4 numbers indicating the RGB(A) layers
• index: positive integer indicating layer(s) to assign a name to
• validate: logical. Make names valid and/or unique?
• cells: cell numbers or missing
• values: replacement values or missing to load all values into memory
• layer: positive integer(s) indicating to which layer(s) to you want to assign these categories or to which you want to set these values. A number < 1 indicates "all layers"
• active: positive integer indicating the active category (column number in value, but not counting the first column
• type: character. The color space. One of "rgb" "hsv", "hsi" and "hsl"

Returns

logical (invisibly)

Examples

s <- rast(ncols=5, nrows=5, nlyrs=3)
x <- s
names(s)
names(s) <- c("a", "b", "c")
names(s)
names(x)

x <- s
set.names(s, c("e", "f", "g"))
names(s)
names(x)

set.ext(x, c(0,180,0,90))

f <- system.file("ex/elev.tif", package="terra")
r <- rast(f)

#values from file to memory
set.values(r)

# change values
set.values(r, 1:1000, 900)