Contents

Index

• Getting Started

• User Guide

• Functions

• Desktop Tools and Development Environment

• Data Import and Export

• Mathematics

• Arrays and Matrices

• Linear Algebra

• Elementary Math

• Trigonometric

• Exponential

• Complex

• Rounding and Remainder

• Discrete Math

• Polynomials

• Interpolation and Computational Geometry

• Cartesian Coordinate System Conversion

• Nonlinear Numerical Methods

• Specialized Math

• Sparse Matrices

• Math Constants

• Data Analysis

• Programming and Data Types

• Object-Oriented Programming

• Graphics

• 3-D Visualization

• GUI Development

• External Interfaces

• Examples

• Release Notes

Learn more about MATLAB

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).

sign - Signum function

Syntax

Description

See Also

Recommended Products