README.md in xgb-0.4.0 vs README.md in xgb-0.4.1

@@ -135,13 +135,13 @@
 
 ```ruby
 [[1, 2, 3], [4, 5, 6]]
 ```
 
-Or a Numo NArray
+Or a Numo array
 
 ```ruby
-Numo::DFloat.new(3, 2).seq
+Numo::NArray.cast([[1, 2, 3], [4, 5, 6]])
 ```
 
 Or a Rover data frame
 
 ```ruby