Returns the sign of a number.

Syntax

s = Sign(m)

Argument

Name

Description

m

A real or complex scalar, vector or matrix.

Output

Name

Description

s

For each non-zero entry, the result is the entry divided by its absolute value, and 0 otherwise.

Example 1

Find the signum of elements in a matrix.

Syntax

S = Sign([1,-2,0,4])

Result

S = 1 -1  0  1

Example 2

Find the signum of a complex value.

Syntax

S = Sign(3 + 4i)

Result

S = 0.6 + 0.8i

See Also:

Abs

Fix

Mod

Rem