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Main Topics Today What is R? How to administrate R? How does R work? How to apply R for statistical problem? How to program your R function? ……… What is R? The legend of R R started in the early 1990’s as a project by Ross Ihaka and Robert Gentleman at the University of Auckland, New Zealand, intended to provide a statistical environment in their teaching lab. The lab had Macintosh computers, for which no suitable commercial environment was available. R’s Parents(1) The S language S: an interactive environment for data analysis developed at Bell Laboratories since 1976 Exclusively licensed by ATT/Lucent to Insightful Corporation, Seattle WA. Product name: “S-plus”. R’s Parents(2) The Scheme language Scheme is a statically scoped and properly tail-recursive dialect of the Lisp programming language invented by Guy Lewis Steele Jr. and Gerald Jay Sussman. Learn more: /projects/scheme/ Scheme’s underlying semantics + S’syntax = R R Now Since mid-1997 there has been a core group who can modify the R source code CVS archive. The R package system CRAN (the Comprehensive R Archive Network ) The characters of R R is “GNU S” — A language and environment for data manipula-tion, calculation and graphical display. That is R is a Free Software (or Open source software). (Here, Free refers to freedom, not price, although R is free in that sense as well.) The core of R is an interpreted computer language. A mosaic of procedure-based programming and object-oriented programming Good interface to procedures written in C, C++, FORTRAN and other languages A flexible data exchange mechanism accessing relational databases -ODBC, PostgreSQL, MySQL and so on. R and Statistics Most packages deal with statistics and data analysis. Powerful statistical graphics. Well crosstalking with other statistical softwares. Most R user are statistical experts. You can learn more modern analysis method from they by email. You can do it when you come across a thing n