R是功能强大的统计软件，和Lisp一样也有一个交互式的命令行环境，还有众多的扩展库，可以用来进行专业的统计分析。要在Common Lisp中方便的调用R的功能，可以试用rcl这个库。安装方法很简单，因为它已经纳入到quicklisp库中了：

(ql:quickload “rcl”)

使用：

* (use-package :rcl)                                                                 T    

* (r-init)                                                                           T

* (r "R.Version")  ("x86_64-pc-linux-gnu" "x86_64" "linux-gnu" "x86_64, linux-gnu" "" "2" "12.1" "2010" "12" "16" "53855" "R" "R version 2.12.1 (2010-12-16)") ((:NAMES "platform" "arch" "os" "system" "status" "major" "minor" "year" "month" "day" "svn rev" "language" "version.string")) 

* (r "seq" 1 5)                                                                      (1 2 3 4 5) 

* (r "*" 2 (r "seq" 1 5))                                                            (2 4 6 8 10) 

* (r "summary" '(123 543 3242 8934 234 643))                                         (123.0d0 311.2d0 593.0d0 2286.0d0 2592.0d0 8934.0d0)