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

@@ -1,15 +1,27 @@
 #!/usr/bin/ruby
+# == Description
+# 
+# This example illustrates how daru, combined with Statsample::Graph::Boxplot
+# can be used for generating box plots of a normally distributed set of data.
+# 
+# The 'rnorm' function, defined in statsample/shorthands generates a Daru::Vector
+# object which contains the specified number of random variables in a normal distribution.
+# It uses the 'distribution' gem for this purpose.
+# 
+# Create a boxplot of the data by specifying the vectors a, b and c and providing 
+# necessary options to Statsample::Graph::Boxplot. The 'boxplot' function is shorthand
+# for calling Statsample::Graph::Boxplot.
 $:.unshift(File.dirname(__FILE__)+'/../lib/')
 require 'statsample'
 Statsample::Analysis.store(Statsample::Graph::Boxplot) do 
-  n=30
-  a=rnorm(n-1,50,10)
-  b=rnorm(n, 30,5)
-  c=rnorm(n,5,1)
+  n = 30
+  a = rnorm(n-1,50,10)
+  b = rnorm(n, 30,5)
+  c = rnorm(n,5,1)
   a.push(2)
+
   boxplot(:vectors=>[a,b,c],:width=>300, :height=>300, :groups=>%w{first first second}, :minimum=>0)
-  
 end
 
 if __FILE__==$0
   Statsample::Analysis.run
 end