2016年8月31日
R语言从基础入门到提高（五）factor 因子
摘要： 第1程序 What's a factor and why would you use it? 100xp In this chapter you dive into the wonderful world of factors. The term factor refers to a statist 阅读全文
posted @ 2016-08-31 20:05 Joe.Smith 阅读(537) 评论(0) 推荐(0) 编辑