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topoorder (biograph)

(Removed) Perform topological sort of directed acyclic graph extracted from biograph object

The function has been removed. Use toposort instead.


order = topoorder(BGObj)


BGObj Biograph object created by biograph (object constructor).



For introductory information on graph theory functions, see Graph Theory Functions.

order = topoorder(BGObj) returns an index vector with the order of the nodes sorted topologically. In topological order, an edge can exist between a source node u and a destination node v, if and only if u appears before v in the vector order. BGObj is a biograph object from which an N-by-N adjacency matrix is extracted and represents a directed acyclic graph (DAG). In the N-by-N sparse matrix, all nonzero entries indicate the presence of an edge.


[1] Siek, J.G., Lee, L-Q, and Lumsdaine, A. (2002). The Boost Graph Library User Guide and Reference Manual, (Upper Saddle River, NJ:Pearson Education).

Version History

Introduced in R2006b

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