File: add_edge.cat

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add_edge(1)                    Scilab function                    add_edge(1)
NAME
  add_edge - adds an edge or an arc between two nodes

CALLING SEQUENCE
  g1 = add_edge(i,j,g)

PARAMETERS

  i : integer, number of start node

  j : integer, number of end node

  g : graph list

  g1 : graph list of the new graph with the added edge

DESCRIPTION
  add_edge returns the graph g1 with a new edge from node number i to node
  number j. If the graph is directed, the edge is an arc.  The number of
  edges plus 1 is taken as the name of the new edge.

EXAMPLE
  ta=[1 1 2 2 2 3 4 5 5 7 8 8 9 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 15 12 13 9 10 14 11 16 1 17 14 15];
  g=make_graph('foo',1,17,ta,he);
  g('node_x')=[283 163 63 57 164 164 273 271 339 384 504 513 439 623 631 757 642];
  g('node_y')=[59 133 223 318 227 319 221 324 432 141 209 319 428 443 187 151 301];
  show_graph(g);
  g=add_edge(1,7,g);
  g('edge_color')=[ones(ta) 11];
  show_graph(g);

SEE ALSO
  add_node, delete_arcs, delete_nodes