Merge pull request #100 from dlcole3/dc/fix_incidence_matrix_for_unconnected_graphs

Fixed bug in `incidence_matrix(hypergraph)` when graph is not fully connected

Author: jalving

src/graph_representations/hypergraph.jl

@@ -128,7 +128,9 @@ function LightGraphs.incidence_matrix(hypergraph::HyperGraph)
         end
     end
     V = Int.(ones(length(I)))
-    return SparseArrays.sparse(I, J, V)
+    m = length(hypergraph.vertices)
+    n = length(hypergraph.hyperedge_map)
+    return SparseArrays.sparse(I, J, V, m, n)
 end
 
 """