劉正山剪報分享
這裡是劉正山在研究與上課之餘閱讀到的一些文章與資訊分享（若有空就加上個人評論）.
March 19, 2012
Survey in R course taught by Thomas Lumley at Statistics.com
http://feedproxy.google.com/~r/RBloggers/~3/owx_iNXu-1c/
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