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arg
Format: arg( z )
Arguments: (num) z Complex number
Returns: (real) The argument or angle of the complex
number z when expressed in polar notation
Description: The argument of a complex number x+yi
is the angle in radians between the positive x-axis and a line
from the origin (0,0) to the point (x,y) in a
Cartesian coordinate plane.
Examples: arg(2) = 0
arg(-2) = 3.142 (PI)
arg(1+I) = 0.785 (PI/4)
See Also: abs, real, imag, I, atan2
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