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Distance to reference values

distValues.Rd

For each cell, compute the distance in value-space to reference values. References are a matrix or data.frame whose columns match the layer names of x, or a SpatVector of locations from which values are extracted.

Usage

# S4 method for class 'SpatRaster,matrix'
distValues(x, y, fun="squared", weights=NULL, ...,
    filename="", overwrite=FALSE, wopt=list())

# S4 method for class 'SpatRaster,data.frame'
distValues(x, y, fun="squared", weights=NULL, ...,
    filename="", overwrite=FALSE, wopt=list())

# S4 method for class 'SpatRaster,SpatVector'
distValues(x, y, fun="squared", center=FALSE, scale=FALSE,
    weights=NULL, ..., filename="", overwrite=FALSE, wopt=list())

Arguments

x

SpatRaster

y

matrix, data.frame, or SpatVector

fun

character. "abs" (mean absolute difference), "squared" (mean squared difference) or a function

weights

numeric. Optional weights for the layers of x

center

logical or numeric. Passed to scale (SpatVector method only)

scale

logical or numeric. Passed to scale (SpatVector method only)

...

additional arguments passed to fun (for the built-in functions, na.rm=TRUE)

filename

character. Output filename

overwrite

logical. If TRUE, filename is overwritten

wopt

additional arguments for writing files as in writeRaster

Value

SpatRaster

See also

bestMatch, scale

Examples

r <- rast(system.file("ex/logo.tif", package="terra"))
pts <- vect(cbind(c(25.25, 34.324), c(54.577, 46.489)))
x <- scale(r)
d <- distValues(x, pts)