Rotates the detrended DEM according to the main direction of the Fourier spectrum

Rotates the detrended DEM according to the main direction of the Fourier spectrum

rotate_raster(rstr, ang_fourier)

Arguments

rstr	a RasterLayer
ang_fourier	numeric, angle of the main component of the 2D Fourier spectrum; the rotation is clockwise

Value

a matrix corresponding to the DEM rotated in the main direction of the Fourier spectrum

Examples

r <- raster::raster(ncol = 3, nrow = 3)
raster::values(r) <- 1:(raster::ncell(r))
raster::as.matrix(r)
#>      [,1] [,2] [,3]
#> [1,]    1    2    3
#> [2,]    4    5    6
#> [3,]    7    8    9
raster::as.matrix(rotate_raster(r, 45))
#>      [,1] [,2] [,3] [,4]
#> [1,]   NA    1    1   NA
#> [2,]    7    4    2    3
#> [3,]    7    8    6    3
#> [4,]   NA    9    9   NA