MATLAB Function Reference

sign

Signum function

Syntax

Y = sign(X)

Description

Y = sign(X) returns an array Y the same size as X, where each element of Y is:

• 1 if the corresponding element of X is greater than zero
• 0 if the corresponding element of X equals zero
• -1 if the corresponding element of X is less than zero

For nonzero complex X, sign(X) = X./abs(X).

See Also
abs         Absolute value and complex magnitude

conj        Complex conjugate

imag        Imaginary part of a complex number

real        Real part of complex number

shrinkfaces

sin, sinh