Convert an adjacency list to an edge array.

   EDGES = adjacencyListToEdges(ADJ)
   Converts the adjacency list ADJ, given as a cell array of adjacent
   indices, to an edge array. 

   Example
     % create adjacency list for a simple graph
     adj = {[2 3], [1 4 5], [1 4], [2 3 5], [2 4]};
     edges = adjacencyListToEdges(adj)
     edges =
          1     2
          1     3
          2     4
          2     5
          3     4
          4     5

   See also
     graphs, polygonSkeletonGraph

Package: matgeom