#13919: Bug in Graph() when input is a weighted matrix
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Reporter: ncohen | Owner: jason, ncohen, rlm
Type: defect | Status: new
Priority: major | Milestone: sage-5.6
Component: graph theory | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors: Nathann Cohen
Merged in: | Dependencies:
Stopgaps: |
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As reported in [1], the following code produces an exception :
{{{
sage: B =
{0:{1:2,2:5,3:4},1:{2:2,4:7},2:{3:1,4:4,5:3},3:{5:4},4:{5:1,6:5},5:{6:7}}
sage: grafo3 = Graph(B,weighted=True)
sage: matad = grafo3.weighted_adjacency_matrix()
sage: grafo4 = Graph(matad,format = "adjacency_matrix", weighted=True)
sage: grafo4.shortest_path(0,6,by_weight=True)
}}}
This, because Sage has some problems understanding that the graph is not a
multigraph...
[1] https://groups.google.com/forum/?fromgroups=#!topic/sage-
support/rIpMl1u7VXE
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13919>
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