;+
; NAME:
; TANH
;
; PURPOSE:
; Calculates the hyperbolic tan function (tanh).
;
; CATEGORY:
; Math
;
; CALLING SEQUENCE:
; Result = TANH(X)
;
; INPUTS:
; X: Argument to tanh (may be an array).
;
; OUTPUTS:
; sinh(X) / cosh(X)
;
; EXAMPLE:
; IDL> PRINT, TANH(1.)
; 0.761594
;
; MODIFICATION HISTORY:
; Written by: Jeremy Bailin
; 12 June 2008 Public release in JBIU
;-
function tanh, x
return, sinh(x)/cosh(x)
end