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adj_lists Scilab Group Scilab function adj_lists
NAME
adj_lists - computes adjacency lists
CALLING SEQUENCE
[lp,la,ls] = adj_lists(g)
[lp,la,ls] = adj_lists(directed,n,tail,head)
PARAMETERS
g : graph list
directed
: integer, 0 (undirected graph) or 1 (directed graph)
n : integer, the number of nodes of the graph
tail
: the row vector of the numbers of the tail nodes of the graph (its size
is the number of edges of the graph)
head
: the row vector of the numbers of the head nodes of the graph (its size
is the number of edges of the graph)
lp : row vector, pointer array of the adjacency lists description of the
graph (its size is the number of nodes of the graph + 1)
la : row vector, arc array of the adjacency lists description of the
graph (its size is the number of edges of the graph)
ls : row vector, node array of the adjacency lists description of the
graph (its size is the number of edges of the graph)
DESCRIPTION
adj_lists computes the row vectors of the adjacency lists description of
the graph g. It is also possible to give adj_lists the description of the
graph given by the number of nodes n and the row vectors tail and head.
EXAMPLE
ta=[2 3 3 5 3 4 4 5 8];
he=[1 2 4 2 6 6 7 7 4];
g=make_graph('foo',1,8,ta,he);
g('node_x')=[129 200 283 281 128 366 122 333];
g('node_y')=[61 125 129 189 173 135 236 249];
show_graph(g);
[lp,la,ls]=adj_lists(g)
[lp,la,ls]=adj_lists(1,g('node_number'),ta,he)
SEE ALSO
chain_struct, graph_2_mat
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