Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site fas.ri.cmu.edu
Path: utzoo!linus!philabs!cmcl2!seismo!rochester!pt.cs.cmu.edu!fas.ri.cmu.edu!peshkin
From: peshkin@fas.ri.cmu.edu (Michael Peshkin)
Newsgroups: net.math
Subject: 2-d spline (non-interpolating) wanted
Message-ID: <217@fas.ri.cmu.edu>
Date: Thu, 5-Dec-85 23:26:11 EST
Article-I.D.: fas.217
Posted: Thu Dec  5 23:26:11 1985
Date-Received: Sat, 7-Dec-85 17:17:13 EST
Organization: Carnegie-Mellon University, CS/RI
Lines: 14

---
I need a spline subroutine (any language) for smoothing a function of
two variables f(x,y).  I have f(x,y) for discrete data points (x,y); a
spline allows interpolation between the discrete points.  A
non-interpolating, or "smoothing" spline does not insist that the values it
provides agree exactly with the data at the discrete data points.  It is
content to miss the points (a little) so that the curve it produces isn't 
too ragged.

If you have, or know of, such a beast please let me know.  

Michael Peshkin       (phone (412) 578-3730)
Robotics Institute  Carnegie-Mellon Univ.  Pittsburgh, PA 15213
---------