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D.16.2.6 fVectorP
Syntax:
Polymake::fVectorP( polytope p )
Type:
- intvec
Purpose:
- the f-vector of p.
Note:
- the computation works via an f-vector computation of a cone whose intersection with a hyperplan yields p,
hence the return might not make sense intuitively if p is not bounded.
However it can be regarded as the f-vector of p in (R')^n, where R' denotes the two point compactification of R
and n is the dimension of the ambient space of p.
Example:
| | LIB"polymake.lib";
==> Welcome to polymake
==> Copyright (c) 1997-2012
==> Ewgenij Gawrilow, Michael Joswig (TU Darmstadt)
==> http://www.polymake.org
intmat M[6][4]=1,1,1,2, 1,-1,-1,-2, 1,1,0,0, 1,-1,0,0, 1,0,1,0, 1,0,-1,0;
polytope p = polytopeViaPoints(M);
Polymake::fVectorP(p);
==> polymake: used package cddlib
==> Implementation of the double description method of Motzkin et al.
==> Copyright by Komei Fukuda.
==> http://www.ifor.math.ethz.ch/~fukuda/cdd_home/cdd.html
==>
==> 6,12,8
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