forum.polymake.org

Posted: **26 Nov 2019, 20:58**

Hello,

I am quite new to both polymake and programming and my question is this:

I have a 6 dimensional polytope with 48 vertices, and I am interested in computing the vertices that are contained in each facet. I was able to use the VERTICES_IN_FACETS command which is great, however I would love to have the vertices in terms of their coordinates instead of indexed by an integer label.

Is it possible to do this with a polymake command?

Thank you very much!

Posted: **26 Nov 2019, 21:51**

Numbers in VERTICES_IN_FACETS refer to the rows of VERTICES matrix.
You can do something like this:

Code: Select all

# $p is the Polytope object
for my $i (0 .. $p->N_FACETS-1) {
  print "facet $i contains vertices:\n", $p->VERTICES->minor($p->VERTICES_IN_FACETS->row($i), All), "\n";
}

Posted: **26 Nov 2019, 22:39**

Thank you very much, it worked wonderfully.

forum.polymake.org

Computing the coordinates of the Vertices_in_facets ?

Computing the coordinates of the Vertices_in_facets ?

Re: Computing the coordinates of the Vertices_in_facets ?

Re: Computing the coordinates of the Vertices_in_facets ?