Graph matrix into network flow

asked 2012-08-06 10:19:34 +0100

brenogil
63 ●2 ●4 ●10

Hello,

I have this marix:

M=matrix(ZZ,6,9,[[1,1,1,0,0,0,0,0,0],[0,0,0,1,1,1,0,0,0],[0,0,0,0,0,0,1,1,1],[-1,0,0,-1,0,0,-1,0,0],[0,-1,0,0,-1,0,0,-1,0],[0,0,-1,0,0,-1,0,0,-1]])

and I am looking to get something like this:

image description

How can I do it?

answered 2012-08-06 12:04:09 +0100

fidbc

2423 ●4 ●26 ●61

Hi,

If you just want the digraph, without the weights you can use

sage: D=DiGraph(M,format='incidence_matrix')

If you want to incorporate weights, you can try something like

sage: A=Matrix(ZZ,[[0,0,0,1,2,3],[0,0,0,4,5,6],[0,0,0,7,8,9],[0,0,0,0,0,0],[0,0,0,0,0,0],[0,0,0,0,0,0]])
sage: D=DiGraph(A,format='weighted_adjacency_matrix')

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Comments

Thank you! I do no know if I am missing some package or something but I cannot make the graph 'behave' like the picture above.

brenogil ( 2012-08-07 03:13:29 +0100 )edit

If you want the vertex labels to appear as in your picture you might want to consider using the `relabel` method. For the edge labels to appear in the plot you can send an `edge_labels=True` argument to the `plot` method.

fidbc ( 2012-08-07 09:57:17 +0100 )edit

Thanks for the hand! I'll pay you a beer whenever I am in Canada!

brenogil ( 2012-08-08 04:06:45 +0100 )edit

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