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Two argument arc-tangent

atan2.Rd

For SpatRasters 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 SpatRasters.

Usage

# S4 method for SpatRaster,SpatRaster
atan2(y, x)

# S4 method for SpatRaster,SpatRaster
atan_2(y, x, filename, ...)

Arguments

y

SpatRaster

x

SpatRaster

filename

character. Output filename

...

additional arguments for writing files as in writeRaster

See also

Math-methods

Examples

r1 <- rast(nrows=10, ncols=10)
r2 <- rast(nrows=10, ncols=10)
values(r1) <- (runif(ncell(r1))-0.5) * 10
values(r2) <- (runif(ncell(r1))-0.5) * 10
atan2(r1, r2)
#> class       : SpatRaster 
#> dimensions  : 10, 10, 1  (nrow, ncol, nlyr)
#> resolution  : 36, 18  (x, y)
#> extent      : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (CRS84) (OGC:CRS84) 
#> source(s)   : memory
#> name        :     lyr.1 
#> min value   : -3.125421 
#> max value   :  2.948635