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terra (version 1.7-83)

scale: Scale values

Description

Center and/or scale raster data. For details see scale

Usage

# S4 method for SpatRaster
scale(x, center=TRUE, scale=TRUE)

Value

SpatRaster

Arguments

x

SpatRaster

center

logical or numeric. If TRUE, centering is done by subtracting the layer means (omitting NAs), and if FALSE, no centering is done. If center is a numeric vector (recycled to nlyr(x)), then each layer of x has the corresponding value from center subtracted from it.

scale

logical or numeric. If TRUE, scaling is done by dividing the (centered) layers of x by their standard deviations if center is TRUE, and the root mean square otherwise. If scale is FALSE, no scaling is done. If scale is a numeric vector (recycled to nlyr(x)), each layer of x is divided by the corresponding value. Scaling is done after centering.

See Also

Examples

Run this code
r <- rast(system.file("ex/logo.tif", package="terra"))   
s <- scale(r)

## the equivalent, computed in steps
m <- global(r, "mean")
rr <- r - m[,1]
rms <- global(rr, "rms")
ss <- rr / rms[,1]

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