set_edge_label is setting labels on intended and unintended graph
I generate some graphs and set one's edge labels. When I look at the
next genetated graph, it's edge labels have been changed.
I'm new to Sage/python so perhaps I goofed, but I doubt it. Thanks
for an explanation or workaround.
I am trying to help my daughter investigate an edge coloring graph
theory problem. Not the normal edge coloring constraint, though.
See the <<<<<<<<<<<<<<<< I added to the output section.
for G in graphs(3):
if G.is_connected():
A = G.adjacency_matrix()
print "Adjacency Matrix:"
print A
print "Edges:"
for e in G.edge_iterator( labels=True):
print e
#G.plot( edge_labels=True )
print "Setting edge labels..."
for i in G.edge_iterator( labels=True):
#print i
#print type( i )
G.set_edge_label( i[0], i[1], 'Red' )
print "Adjacency Matrix:"
print A
print "Edges:"
for j in G.edge_iterator( labels=True):
print j
#G.plot( edge_labels=True )
print "----------------------------"
Adjacency Matrix:
[0 1 1]
[1 0 0]
[1 0 0]
Edges:
(0, 1, None)
(0, 2, None)
Setting edge labels...
Adjacency Matrix:
[0 1 1]
[1 0 0]
[1 0 0]
Edges:
(0, 1, 'Red')
(0, 2, 'Red')
----------------------------
Adjacency Matrix:
[0 1 1]
[1 0 1]
[1 1 0]
Edges:
(0, 1,
'Red')
<<<<<<<<<<<<<<<<
(0, 2,
'Red')
<<<<<<<<<<<<<<<<
(1, 2, None)
Setting edge labels...
Adjacency Matrix:
[0 1 1]
[1 0 1]
[1 1 0]
Edges:
(0, 1, 'Red')
(0, 2, 'Red')
(1, 2, 'Red')
----------------------------
--
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
