Compute the bearing of a speed

This function convert a speed vector represented in complex number into a bearing angle (0°=N ; 90°=E...). This conversion is needed because trigonomtric angle are different than bearing.

Usage

speed2bearing(
  speed,
  speed_ref = complex(real = 0, imaginary = 1),
  positive = TRUE
)

Arguments

speed

speed as complex value

speed_ref

reference vector of the angle. Default is the North in order to return bearing. Normal trigonometriy should be speed_ref = 1

positive

logical to ensure the bearing is positive between 0-360 degree.

Value

bearing angle in degree