cloud_wei
到主页上点击右下角的Contributed，然后就出现一堆可以自有下载的文档，下面就是cards，在里面找找。
Short Documents and Reference Cards:
“R reference card” by Jonathan Baron (PDF).
“R and Octave” by Robin Hankin (Text), a reference sheet translating between the most common Octave (or Matlab) and R commands.
A “time series reference card” (PDF) and a “regression reference card” (PDF) by Vito Ricci.
“R reference card” by Tom Short ( PDF, LaTeX source ).
