====== R ======
  *   官网：[[http://www.r-project.org/|r-project.org]]
  *   简介：R语言用于统计学的计算与绘图，近期流行于数据挖掘领域。R语言起源于贝尔实验室，属于[[http://www.gnu.org|GNU project]]。
  *   [[http://health.adelaide.edu.au/psychology/ccs/teaching/lsr/|Learning Statistics with R]]