raster (version 1.9-27)

direction: Direction

Description

The direction (azimuth) to or from the nearest cell that is not NA. The direction unit is in radians, unless you use argument degrees=TRUE.

Usage

direction(x, ...)

Arguments

x

a RasterLayer object

...

additional arguments. See Details.

Value

• A RasterLayer object

Details

The following additional arguments can be passed, to replace default values for this function rll{ filename Filename for the output RasterLayer from Logical. Default is FALSE. If TRUE, the direction from (instead of to) the nearest cell that is not NA is returned degrees Logical. If FALSE (the default) the unit of direction is radians. format Character. Output file type. See writeRaster datatype Character. Output data type. See dataType overwrite Logical. If TRUE, "filename" will be overwritten if it exists progress Character. "text", "window", or "" (the default, no progress bar) }

See Also

distance, gridDistance For the direction between points, see the azimuth function in the geosphere package

Examples

r <- raster(ncol=36,nrow=18)
r[] <- NA
r[306] <- 1
b <- direction(r) 
#plot(b)