comp.lang.idl-pvwave archive - RDF feed
type: channel
description: Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
items: Numerical Recipes diffs?
items: Re: Numerical Recipes

Numerical Recipes diffs?
type: item
description: Does anyone know what IDL did between IDL3 and IDL4 as far as the numerical recipes subroutines go? I've been testing a fitting program that uses the LUDCMP and LUBKSB routines form _Numerical Recipes_, and I've been using IDL's canned routines. The canned routines got name changes during the switch from IDL3 to IDL4, from "nr_ludcmp" and "nr_lubksb" to "ludc" and "lusol". That's not all though--somehow the code got changed around so that I get different results depending on which version of IDL I use even if the input is exactly the same! I don't think IDL provides the source for these routines in their libraries; they leave them as executables. So does anyone know what IDL did between versions, or should I just forget about this and rewrite everything from scratch (which would be really annoying)? -- --kachun +** Center for Astrophysics and Space Astronomy **+ +** University of Colorado, Boulder **+ +** Email: kachun@casa.colorado.edu **+ +** http://casa.colorado.edu/~kachun **+
creator: kachun
date: 1996-06-19T07:00:00-00:00

Re: Numerical Recipes
type: item
description: Dave Klassen wrote: > I've been looking for a nice easy way to maximize a fairly complex > function using IDL. I know that there are many Numerical Recipes > routines built into IDL, but not the one I need. I've used the > NR routine called AMOEBA before to minimize a chi-squared > function and now I'd like to try to use it to maximize a > correlation function. I've written a PV-WAVE version of AMOEBA. I can't vouch for its efficiency, but let me know if you want to use it as a starting point. -- Ewan Macpherson <macpherson@waisman.wisc.edu> Hearing Development Research Lab, Waisman Center University of Wisconsin - Madison http://www.waisman.wisc.edu/~macpherson/
creator: Ewan A. Macpherson
date: 1997-09-17T07:00:00-00:00