it turns out when you learn more and know more, you will think about moving to c /c++, because they are more lower level languages. use SAS to solve problem, this is little connect to 大牛, just familiar with it, know how to solve some problem more appropriate. the people using it, one of the important things is Business sense: always thinking what that model means for your business.
of course,the math \stat\software engineering behind SAS are huge. the core people construct SAS are 大牛, no the user using it.
，如何界定最高水平？
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