Path: news.mathworks.com!not-for-mail
From: "John D'Errico" <woodchips@rochester.rr.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: volume
Date: Wed, 18 Aug 2010 17:50:30 +0000 (UTC)
Organization: John D'Errico (1-3LEW5R)
Lines: 14
Message-ID: <i4h6h6$7s3$1@fred.mathworks.com>
References: <hkp2qk$ln8$1@fred.mathworks.com> <hkp5kj$fvq$1@fred.mathworks.com> <i4h5iv$nld$1@fred.mathworks.com>
Reply-To: "John D'Errico" <woodchips@rochester.rr.com>
NNTP-Posting-Host: webapp-02-blr.mathworks.com
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1282153830 8067 172.30.248.37 (18 Aug 2010 17:50:30 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Wed, 18 Aug 2010 17:50:30 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 869215
Xref: news.mathworks.com comp.soft-sys.matlab:663118

"Guillaume " <fufubynight@free.fr> wrote in message <i4h5iv$nld$1@fred.mathworks.com>...
> Hello, 
> 
> I have a set of points in an N-dimensional space. By means of convhulln, I computed the volume of the convex hull, but I would like now to compute the volume of the "non convex hull", and compare them to have a measure of convexity.
> 
> What would you propose?

How have you computed the "non-convex" hull?

Do you have a triangulated surface as generated by an
alpha shape? If so, it is quite easy. If not, then you still
need to define that non-convex hull in some way.

John