public static JavaRDD<List<Writable>> normalize(Schema schema,JavaRDD<List<Writable>> data){
  return normalize(schema,data,0,1,Collections.<String>emptyList());
}

public static JavaRDD < List < Writable > > normalize ( Schema schema , JavaRDD < List < Writable > > data ) { return normalize ( schema , data , 0 , 1 , Collections . < String > emptyList ( ) ) ; }
scale all data 0 to 1
