Network::changeEdge --
changes weight and capacity of one or several edges
IntroductionNetwork::changeEdge(G, e, Eweight=c,
Capacity=l) changes the weight of edge e in network
G to c and its capacity to
l.
Call(s)Network::changeEdge(G, e <, Eweight=c> <, Capacity=t>)
Network::changeEdge(G, l <, Eweight=lc> <, Capacity=lt>)
Parameterslc,lt |
- | lists of numbers |
c,t |
- | numbers |
l |
- | list of edges |
e |
- | edge |
G |
- | network |
OptionsEweight |
- | change the weight of the edge |
Capacity |
- | change the capacity of the edge |
ReturnsThe altered network
DetailsNetwork::changeEdge changes the weight and capacity of
one or several edges in a network. An edge is given as a list
containing two nodes of the network. An error is raised if the
specified edge is not contained in the network.Network::changeEdge(G, e, Eweight=c) changes the weight of edge
e in the network G to the new value
c.Network::changeEdge(G, e, Capacity=t) changes the capacity of edge
e in the network G to the new value
t.Network::changeEdge(G, e, Eweight=c, Capacity=t)
changes the weight and capacity of edge e
simultaneously.ChangeEdge(G,l,Eweight=lc,Capacity=lt) has to be given
where l is a list of edges and lc and
lt are numerical lists with exactly the same number of
elements as l.
Example
1We construct a cyclic network with default weights. Then, those weights are changed.
>> N1 := Network::cycle([v1, v2, v3, v4]): Network::eWeight(N1)
table(
[v4, v1] = 1,
[v3, v4] = 1,
[v2, v3] = 1,
[v1, v2] = 1
)
>> N2 := Network::changeEdge(N1, [[v1,v2], [v2,v3]], Eweight=[2,2]): Network::eWeight(N2)
table(
[v4, v1] = 1,
[v3, v4] = 1,
[v2, v3] = 2,
[v1, v2] = 2
)
Network::ChangeEdge