From e70f29817bf4301f9dd3e16598636e2bb4871f90 Mon Sep 17 00:00:00 2001
From: Ilya Grigorik <ilya@igvita.com>
Date: Fri, 6 Sep 2013 19:39:57 -0700
Subject: [PATCH] require graphr only when calling graph(), closes #11

---
 lib/decisiontree/id3_tree.rb | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/decisiontree/id3_tree.rb b/lib/decisiontree/id3_tree.rb
index 43926e3..8f9a7e8 100755
--- a/lib/decisiontree/id3_tree.rb
+++ b/lib/decisiontree/id3_tree.rb
@@ -3,8 +3,6 @@
 ### Copyright (c) 2007 Ilya Grigorik <ilya AT igvita DOT com>
 ### Modifed at 2007 by José Ignacio Fernández <joseignacio.fernandez AT gmail DOT com>
 
-require 'graphr'
-
 class Object
   def save_to_file(filename)
     File.open(filename, 'w+' ) { |f| f << Marshal.dump(self) }
@@ -133,6 +131,7 @@ module DecisionTree
     end
 
     def graph(filename)
+      require 'graphr'
       dgp = DotGraphPrinter.new(build_tree)
       dgp.write_to_file("#{filename}.png", "png")
     end