From: "Zoltan Kemeny" 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