DRAWEDGELABELS Draw values associated to graph edges.
 
   usage:
   drawEdgeLabels(NODES, EDGES, VALUES);
   NODES: array of double, containing x and y values of nodes
   EDGES: array of int, containing indices of in and out nodes
   VALUES is an array the same length of EDGES, containing values
   associated to each edges of the graph.

   The function computes the center of each edge, and puts the text with
   associated value.
   
   H = drawEdgeLabels(...) return array of handles to each text structure,
   making possible to change font, color, size


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   author: David Legland 
   INRA - TPV URPOI - BIA IMASTE
   created the 10/02/2003.

Package: matgeom