Two argument arc-tangent

For Raster* objects x and y, atan2(y, x) returns the angle in radians for the tangent y/x, handling the case when x is zero. See Trig

See Math-methods for other trigonometric and mathematical functions that can be used with Raster* objects.

atan2(y, x)

Arguments

y

Raster* object

x

Raster* object

See also

Math-methods

Examples

r1 <- r2 <- raster(nrow=10, ncol=10)
values(r1) <- (runif(ncell(r1))-0.5) * 10
values(r2) <- (runif(ncell(r1))-0.5) * 10
atan2(r1, r2)
#> class      : RasterLayer 
#> dimensions : 10, 10, 100  (nrow, ncol, ncell)
#> resolution : 36, 18  (x, y)
#> extent     : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
#> crs        : +proj=longlat +datum=WGS84 +no_defs 
#> source     : memory
#> names      : layer 
#> values     : -3.128422, 3.11529  (min, max)
#>