sign

Find the sign function of a number.

Syntax

• R = sign(M)

Input argument

• M - a variable

Output argument

• R - result of sign.

Description

sign find the sign function of a number.

-1 if the corresponding element of M is less than 0.

0 if the corresponding element of M equals 0.

1 if the corresponding element of M is greater than 0.

If input argument is a complex number, sign computes M ./ abs(M).

Example

V = [-1 0 15 NaN Inf];
sign(V)

See also

conj, abs.

History

Author

Allan CORNET