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数据挖掘方面的非常经典的ppt，推荐下载。值得一看-Data mining is a very classic ppt, recommended download. Worth a visit

weka教程包含权威内容，weka基于java语言的数据挖掘工具，该PPT中有非常详实的原理介绍-weka tutorial contains authoritative content, weka java-based language for data mining tool, which has a very informative PPT introduced the principle