arg

The argument of a complex number.

Syntax

• arg(z)

  • z is a complex number

Description

If z is a complex number, arg(z) is the argument of z, that is, the angle that z makes in the counter-clockwise direction from the positive real axis in the Argand diagram, normalised to (-π, π]. By definition, arg(0) is 0.

Examples

arg(0)

0

arg(i)

1.57079632679	(=π/2)

arg(−1)

3.14159265359	(=π)

arg(arccosh(i))

1.05947111646

See also

• abs

• sgn