[BioRuby-cvs] bioruby/lib/bio tree.rb,1.3,1.4

[Naohisa Goto]

Update of /home/repository/bioruby/bioruby/lib/bio
In directory dev.open-bio.org:/tmp/cvs-serv20722/lib/bio

Modified Files:
	tree.rb 
Log Message:
Added Bio::Tree::total_distance to calculate total distance (total 
length) of the current tree.


Index: tree.rb
===================================================================
RCS file: /home/repository/bioruby/bioruby/lib/bio/tree.rb,v
retrieving revision 1.3
retrieving revision 1.4
diff -C2 -d -r1.3 -r1.4
*** tree.rb	13 Dec 2006 16:29:37 -0000	1.3
--- tree.rb	15 Dec 2006 18:32:00 -0000	1.4
***************
*** 694,697 ****
--- 694,706 ----
      end
  
+     # Returns total distance of all edges.
+     # It would raise error if some edges didn't contain distance values.
+     def total_distance
+       distance = 0
+       self.each_edge do |source, target, edge|
+         distance += get_edge_distance(edge)
+       end
+       distance
+     end
  
      # Calculates distance matrix of given nodes.