From: "Zoltan Kemeny" <kemeny@truegravity.com>
Subject: Re: Function that resembles Hyerbolic Tangent
Date: Tue, 4 Jan 2000 14:39:09 -0700
Newsgroups: sci.engr.civil,sci.engr.mech,sci.math,sci.math.num-analysis,sci.mech,sci.mech.fluids
Summary: gudermannian function

You may try the gudermannian function:

gd(y)=2arctan(exp(y))-PI/2=2arctan(tanh(y/2))

This goes above tanh(y) but not assymtotic..

Zoltan

wrote in message <84pmrj$1o8$1@beethoven.singa.pore.net>...
>Hi
>
>I have a set of data points which seems to take on the tanh function though
>not exactly.
>Is there other functions which resembles tanh? ie start from 0,0 and tend to
>a horizontal asymtote?
>
>Thanks