ASECH Inverse Hyperbolic Secant Function

Section: Mathematical Functions

Usage

Computes the inverse hyperbolic secant of its argument. The general syntax for its use is 
  y = asech(x)

where x is an n-dimensional array of numerical type.

Function Internals

The asech function is computed from the formula

Examples

Here is a simple plot of the inverse hyperbolic secant function 
--> x1 = -20:.01:-1;
--> x2 = 1:.01:20;
--> plot(x1,imag(asech(x1)),x2,imag(asech(x2))); grid('on');