R help - Oct 2008 - Vertex enumeration and center of mass for convex polytops

Dear All!

I am looking for a package that contains routines for vertex enumeration 
and center of mass computation for convex polytops.

Thanks in advance,
Serguei Kaniovski

Hi Mosche,

In my problem the polytope is defined not by its vertices, but by a set of
linear equations and inequalities.

Serguei



Moshe Olshansky schrieb:
> Hi,
>
> If you know that all your points represent vertices of a convex polygon you
do not need any special package.
> The center of mass is just the mean of the coordinates.
> To enumerate the vertices, compute the vectors from the center of mass to
all the vertices. Using atan2 function compute the arguments of all these
vectors (between 0 and 2*pi) and number the points according to their argument.
>
>
> --- On Wed, 1/10/08, Serguei Kaniovski <Serguei.Kaniovski at
wifo.ac.at> wrote:
>
>   
>> From: Serguei Kaniovski <Serguei.Kaniovski at wifo.ac.at>
>> Subject: [R] Vertex enumeration and center of mass for convex polytops
>> To: r-help at stat.math.ethz.ch
>> Received: Wednesday, 1 October, 2008, 10:00 PM
>> Dear All!
>>
>> I am looking for a package that contains routines for
>> vertex enumeration 
>> and center of mass computation for convex polytops.
>>
>> Thanks in advance,
>> Serguei Kaniovski
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained,
>> reproducible code.
>>