Minh Nguyen <nguyenmi...@gmail.com> writes: > def G.incidence_matrix(orientation=False) > > The keyword "orientation" takes on a Boolean value. So > G.incidence_matrix(orientation=False) or G.incidence_matrix() returns > the unoriented incidence matrix of an undirected graph G. Furthermore, > G.incidence_matrix(orientation=True) returns the oriented incidence > matrix of an undirected graph G, which is the current behaviour. The > keyword "orientation" has no effect if G is a digraph. So > "orientation" is only meant to affect undirected graphs.
I'd let it also affect directed graphs. It does something useful, there is no point not allowing the user to do it. Ooops, maybe that was your intention anyway - in the case of digraphs, it returns the given orientation. But if orientation=false, it could well return the "unoriented" incidence matrix... Martin -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
