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Contents

Index

• Getting Started

• User's Guide

• Desktop Tools and Development Environment

• Data Import and Export

• Mathematics

• Arrays and Matrices

• Linear Algebra

• Elementary Math

• Trigonometric

• Exponential

• Rounding and Remainder

• Discrete Math

• Polynomials

• Interpolation and Computational Geometry

• Cartesian Coordinate System Conversion

• Nonlinear Numerical Methods

• Special Functions

• Sparse Matrices

• Math Constants

• Data Analysis

• Programming and Data Types

• Object-Oriented Programming

• 3-D Visualization

• GUI Development

• External Interfaces

• Release Notes

sech - Hyperbolic secant

Syntax

Y = sech(X)

Description

The sech function operates element-wise on arrays. The function's domains and ranges include complex values. All angles are in radians.

Y = sech(X) returns an array the same size as X containing the hyperbolic secant of the elements of X.

Examples

Graph the hyperbolic secant over the domain −2π ≤ x ≤ 2π.

x = -2*pi:0.01:2*pi; 
plot(x,sech(x)), grid on

Definitions

The hyperbolic secant of z is

Algorithms

sec uses FDLIBM, which was developed at SunSoft, a Sun Microsystems, Inc. business, by Kwok C. Ng, and others. For information about FDLIBM, see http://www.netlib.org.

See Also

asec | asech | sec

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