chickadee » srfi-94 » make-polar

These procedures are part of every implementation that supports general complex numbers. Suppose x1, x2, x3, and x4 are real numbers and z is a complex number such that

   z = x1 + i x2 = x3 e^i x4

Then

(make-rectangular x1 x2)               ==> z
(make-polar x3 x4)                     ==> z

where -pi < x_angle <= pi with x_angle = x4 + 2pi n for some integer n.

If an argument is not real, then these procedures signal an error.