examples/u_test.rb in statsample-1.5.0 vs examples/u_test.rb in statsample-2.0.0

@@ -1,12 +1,20 @@
 #!/usr/bin/ruby
 $:.unshift(File.dirname(__FILE__)+'/../lib')
+
+# == Description
+#
+# Example illustrating Mann-Whitney U test with statsample.
+#
+# == References
+# 
+# http://en.wikipedia.org/wiki/Mann%E2%80%93Whitney_U_test
 require 'statsample'
 
 Statsample::Analysis.store(Statsample::Test::UMannWhitney) do
 
-  a=10.times.map {rand(100)}.to_numeric
-  b=20.times.map {(rand(20))**2+50}.to_numeric
+  a = Daru::Vector.new(10.times.map {rand(100)})
+  b = Daru::Vector.new(20.times.map {(rand(20))**2+50})
 
   u=Statsample::Test::UMannWhitney.new(a,b)
   summary u
 end