spec_atan function

Quadrant-specific inverse of the tangent

Returns the quadrant specific inverse of the tangent

atan2_spec(x, y)

atan2d_spec(x, y)

Arguments

• x, y: dividend and divisor that comprise the sum of sines and cosines, respectively.

Returns

numeric.

References

Jammalamadaka, S. Rao, and Ambar Sengupta (2001). Topics in circular statistics. Vol. 5. world scientific.