File: predecessors.cat

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scilab 2.4-1
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predecessors(1)                Scilab function                predecessors(1)
NAME
  predecessors - tail nodes of incoming arcs of a node

CALLING SEQUENCE
  a = predecessors(i,g)

PARAMETERS

  i : integer

  g : graph list

  a : row vector of integers

DESCRIPTION
  predecessors returns the row vector of the numbers of the tail nodes of the
  incoming arcs to node i for a directed graph g .

EXAMPLE
  ta=[1  6  2  4  7  5  6  8  4  3  5 1];
  he=[2  1  3  6  4  8  8  7  2  7  3 5];
  g=make_graph('foo',1,8,ta,he);
  g('node_x')=[285  284  335  160  405  189  118  45];
  g('node_y')=[266  179   83  176  368  252  64  309];
  show_graph(g);
  a=predecessors(8,g)
  show_nodes(a);

SEE ALSO
  neighbors, successors