说明：  Weka的全名是怀卡托智能分析环境(Waikato Environment for Knowledge Analysis)，是一款免费的，非商业化(与之对应的是SPSS公司商业数据挖掘产品-
(Weka is a collection of machine learning algorithms for data mining tasks. The algorithms can either be applied directly to a dataset or called your own Java code.)