java - how to calculate outdegree of DAG which is represented using adjancency matrix -

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i need method calculate outdegree of each vertex of dag check whether leaf or not.i m using java boolean adjancency matrix representation

sum along row. in adjacency matrix, there 1 @ position (i, j) if there edge vertex i vertex j. therefore, outgoing edges of vertex i in row i. sum of row i therefore gives outdegree of vertex i.

for transposed adjacency matrix, sum along columns.

like david says, if you're interested in whether outdegree 0 or not can save work stopping summation if find 1.


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