rasterVis: xyLayer – R documentation

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xyLayer

Create a numeric vector from a function of the coordinates.

xyLayer(object, dirXY = y, vector = TRUE, maxpixels)

`object`	A `Raster` or a `SpatRaster` object.
`dirXY`	A expression indicating the function of `x` and `y` (coordinates of the `Raster` object) to be evaluated.
`vector`	Logical. If TRUE (default) a numeric vector is returned, else a `Raster` or a `SpatRaster` object is returned.
`maxpixels`	A positive integer giving the number of cells to display, for `sampleRegular` or `spatSample`.

A numeric vector or a Raster/SpatRaster object.

Oscar Perpiñán Lamigueiro.

f <- system.file("external/test.grd", package="raster")
r <- raster(f)
dirX <- xyLayer(r, x)
dirXY <-xyLayer(r, sqrt(x^2 + y^2))

Visualization Methods for Raster Data

v0.50.2

GPL-3

Authors

Oscar Perpinan Lamigueiro [cre, aut] (<https://orcid.org/0000-0002-4134-7196>), Robert Hijmans [aut]

Initial release