contract_edge — contracts edges between two nodes
g1 = contract_edge(i,j,g)
integer, number of start or end node of edge
integer, number of end or start node of edge
The new graph
contract_edge
returns the graph g1
, the edges between the nodes
number i
and j
being deleted, the nodes being reduced to one
node with the same name as node i
and located at the middle point
between the 2 previous nodes.
ta=[1 1 2 2 2 3 4 5 5 7 8 8 9 10 10 10 10 10 11 12 13 13 13 14 15 16 16 17 17]; he=[2 10 3 5 7 4 2 4 6 8 6 9 7 7 11 13 13 15 12 13 9 10 14 11 16 1 17 14 15]; g=make_graph('foo',1,17,ta,he); g.nodes.graphics.x=[283 163 63 57 164 164 273 271 339 384 504 513 439 623 631 757 642]; g.nodes.graphics.y=[59 133 223 318 227 319 221 324 432 141 209 319 428 443 187 151 301]; g.nodes.graphics.name=string(1:node_number(g)); g.nodes.graphics.display='name'; show_graph(g);hilite_nodes([10 13]) g1=contract_edge(10,13,g); show_graph(g1,'new');hilite_nodes(10)