学习R语言的时候也可以参考一下这个PPT，上海师范大学，汤银才老师，R语言与统计分析-The time to learn R language can also refer to the PPT, Shanghai Normal University, Tom was a teacher Silver, R language and statistical analysis

PL layer inputs w.r.t PCIE

介绍SAS和R的基本知识，PPT比较详细(The basic knowledge of SAS and R is introduced in detail)