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.TH predecessors 1 "September 1996" "Scilab Group" "Scilab function"
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predecessors - tail nodes of incoming arcs of a node
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: row vector of integers
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\fVpredecessors\fR returns the row vector of the numbers of the tail nodes of
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the incoming arcs to node \fVi\fR for a directed graph \fVg\fR .
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ta=[1 6 2 4 7 5 6 8 4 3 5 1];
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he=[2 1 3 6 4 8 8 7 2 7 3 5];
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g=make_graph('foo',1,8,ta,he);
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g('node_x')=[285 284 335 160 405 189 118 45];
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g('node_y')=[266 179 83 176 368 252 64 309];