From: PREUSSER@fhi-berlin.mpg.de (Albrecht PREUSSER)
Subject: Re: Akima Spline
Date: Wed, 17 Feb 1999 15:58:06 +0100
Newsgroups: sci.math.num-analysis

In article <7a25qd$a1$1@juliana.sprynet.com>, "John Laughlin" <jalaughlin@sprynet.com> wrote:

> I am looking for a version of Akima's algorithm
> (A New Method of Interpolation and Smooth Curve
> Fitting Based on Local Procedures, ACM vol. 17,
> 1970.) that can be used to recover derivatives
> and which stores intermediate information
> (averaged slopes at the points).  I plan to
> call the routine a large number of times but
> the given points do not change.
> 
> John Laughlin
It is Algorithm 433 from TOMS. You get via the following URL:
http://www.netlib.org/toms/433

Hope that helps.
-- 
Dr. Albrecht Preusser             
Gemeinsames Rechenzentrum         
Fritz-Haber-Institut der MPG      
Faradayweg 4-6                    
D-14195 Berlin (Dahlem)          
Phone:  +49-30-84133-220          
     http://www.fhi-berlin.mpg.de/~grz/pub/preusser.html