JuliaLang/Graphs.jl — pull request #44 by wlbksy (2013-09-11 06:02:46+00:00)
Title: fix weight_matrix, remove weight_matrix_sparse

when (i,j) is not a edge of graph, weight w_{i,j} should be Inf instead of 0.
weight w_{i,j} should be 0 only when i==j

therefore, there would be no sparse version of weight matrix