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

@@ -1,16 +1,19 @@
 #!/usr/bin/ruby
 $:.unshift(File.dirname(__FILE__)+'/../lib/')
 
+# == Description
+# 
+# This example shows how multiple regression can be performed using statsample and daru.
 require 'statsample'
 
 Statsample::Analysis.store(Statsample::Regression::Multiple) do
 
   samples=2000
-  ds=dataset('a'=>rnorm(samples),'b'=>rnorm(samples),'cc'=>rnorm(samples),'d'=>rnorm(samples))
+  ds=dataset(:a => rnorm(samples),:b => rnorm(samples),:cc => rnorm(samples),:d => rnorm(samples))
   attach(ds)
-  ds['y']=a*5+b*3+cc*2+d+rnorm(samples)
-  summary lr(ds,'y')
+  ds[:y] = a*5+b*3+cc*2+d+rnorm(samples)
+  summary lr(ds,:y)
 end
 
 if __FILE__==$0
    Statsample::Analysis.run_batch
 end