Path: news.mathworks.com!not-for-mail
From: "John D'Errico" <woodchips@rochester.rr.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Plotting 3-D Surface & Surface Fitting
Date: Tue, 4 Dec 2007 22:50:21 +0000 (UTC)
Organization: John D'Errico (1-3LEW5R)
Lines: 38
Message-ID: <fj4ljd$n3g$1@fred.mathworks.com>
References: <fj46nh$cvl$1@fred.mathworks.com> <fj4h2m$ei8$1@fred.mathworks.com> <fj4hoc$o0f$1@fred.mathworks.com>
Reply-To: "John D'Errico" <woodchips@rochester.rr.com>
NNTP-Posting-Host: webapp-05-blr.mathworks.com
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1196808621 23664 172.30.248.35 (4 Dec 2007 22:50:21 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Tue, 4 Dec 2007 22:50:21 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 869215
Xref: news.mathworks.com comp.soft-sys.matlab:440825



"Bruno Luong" <brunoluong@yahoo.com> wrote in message 
<fj4hoc$o0f$1@fred.mathworks.com>...
> "John D'Errico" <woodchips@rochester.rr.com> wrote in or
> > more simply gridfit from the File Exchange
> > will help here. 
> > 
> 
> I have take a look at gridfit the other day, it's an awsome
> tool, highly recommended.
> 
> Is there any similar tool for interpolating in 3D?
> 
> Bruno 

Not available in the public domain. It gets tricky,
since gridfit is a variation of a tool that I developed
almost 20 years ago. At the time, Kodak had me
gain several US patents on the methods used, AS
they are applied to color characterization
modeling. I then built nice tools for this purpose
in Matlab to solve these problems in 3d and above.
I've used those tools for up to 7-d surfaces, and
I believe them to still be in use.

When I wrote gridfit to put on the file exchange
after my retirement, I specifically chose methods
that were not covered in those patents in my
name, and I restricted it to work only in 2-d. As
such, it cannot offer any conflict.

So, no, sorry. Despite the many times that I've
been asked for a higher dimensional version, I
can't encourage anyone to potentially violate a
patent. Perhaps I can change my mind one day
in the future when those old patents are no
longer active...

John