第一次接觸R語言
http://dataman.tumblr.com/post/140968580796/r%E6%95%99%E5%AD%B8%E7%9B%AE%E9%8C%84
http://www.learn-r-the-easy-way.tw/chapters/1
https://cran.r-project.org/bin/windows/base/
https://www.rstudio.com/products/rstudio/download/
http://dataman.tumblr.com/post/140968580796/r%E6%95%99%E5%AD%B8%E7%9B%AE%E9%8C%84
http://www.learn-r-the-easy-way.tw/chapters/1
https://cran.r-project.org/bin/windows/base/
https://www.rstudio.com/products/rstudio/download/