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)
Raster* object
Raster* object
# NOT RUN {
r1 <- r2 <- raster(nrow=10, ncol=10)
r1[] <- (runif(ncell(r1))-0.5) * 10
r2[] <- (runif(ncell(r1))-0.5) * 10
atan2(r1, r2)
# }
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