delete_edges — deletes all the arcs or edges between a set of nodes
g1 = delete_edges(ij,g)
matrix of integers (number of nodes)
graph data structure of the new graph without the arcs or edges defined by ij
If g is a directed graph,
delete_edges returns the graph g1
with the arcs defined by matrix ij being deleted.
ij must be a n x 2 matrix of node numbers: the
n edges to be deleted are defined by couples of nodes
(ij(i,1), ij(i,2)).
If g is an undirected graph, the edges
corresponding to matrix ij are deleted.
delete_edges and delete_arcs
define the same function
//Create a graph
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]/2;
g.nodes.graphics.y=[59 133 223 318 227 319 221 324 432 141 209 319 428 443 187 151 301]/2;
g.nodes.graphics.display='number';
show_graph(g);
//Select edges to be deleted, edges are given by their (tail, head) couple
ij=[13 10;8 6;5 4;4 2];
hilite_edges(index_from_tail_head(g,ij(:,1),ij(:,2)))
//Delete the arcs
gt=delete_edges(ij,g);
show_graph(gt,'new');
g.directed=0;
gt=delete_edges(ij,g);
show_graph(gt,'new');