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ABSTRACT: Given an undirected/directed large weighted data graph and a similar smaller weighted pattern graph, the problem of weighted
subgraph matching is to find a mapping of the nodes in the pattern graph to a subset of nodes in the data graph such that
the sum of edge weight differences is minimum. Biological interaction networks such as protein-protein interaction networks
and molecular pathways are often modeled as weighted graphs in order to account for the high false positive rate occurring
intrinsically during the detection process of the interactions. Nonetheless, complex biological problems such as disease gene
prioritization and conserved phylogenetic tree construction largely depend on the similarity calculation among the networks.
Although several existing methods provide efficient methods for graph and subgraph similarity measurement, they produce nonintuitive
results due to the underlying unweighted graph model assumption. Moreover, very few algorithms exist for weighted graph matching
that are applicable with the restriction that the data and pattern graph sizes are equal. In this paper, we introduce a novel
algorithm for weighted subgraph matching which can effectively be applied to directed/undirected weighted subgraph matching.
Experimental results demonstrate the superiority and relative scalability of the algorithm over available state of the art
methods.
KeywordsWeighted graphs–Weighted subgraph matching– Canonical representation–Biological networks
Journal of Intelligent Information Systems 04/2012; · 0.62 Impact Factor
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