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THE BASIC R README (See "FAQ" and "RESOURCES" for more detailed information) (See "INSTALL" for help on installation) 1. INTRODUCTION This directory contains the source code tree for R, which is a language which is not entirely unlike (version 3 of) the S language developed at AT&T Bell Laboratories by Rick Becker, John Chambers and Allan Wilks. Indeed in the (present) absence of an R manual, you can (mostly) get along by using the S manuals. R is free software distributed under a GNU-style copyleft. Currently the software is undergoing active development. Discussion of the development process is carried out on the "r-devel" mailing list. See the file RESOURCES for details on how to subscribe to this list. 2. HISTORY R was initially written by Robert Gentleman and Ross Ihaka of the Statistics Department of the University of Auckland. In addition, a large group of individuals has contributed to R by sending code and bug reports. Since mid-1997 there has been a core group who can modify the R source code CVS archive. The group currently consists of Douglas Bates, Peter Dalgaard, Robert Gentleman, Kurt Hornik, Ross Ihaka, Friedrich Leisch, Thomas Lumley, Martin Maechler, Guido Masarotto, Paul Murrell, Brian Ripley, Duncan Temple Lang and Luke Tierney. As noted above, discussions of the development process take place in the r-devel mailing list. 3. PRESENT STATUS The present version implements most of the functionality in the 1998 book book "The New S Language" (the "Blue Book") and many of the applications. In addition, we have implemented a certain amount of functionality from the 1992 book "Statistical Models in S" (the "White Book"). In particular we have functioning versions of "aov", "glm", "lm" and "loess", and "tree" is available as an add-on package. What we have in the way of manual is in the directory in an "output independent" form which can be used to create versions for HTML, LaTeX, troff etc. 4. GOALS Our aim at the start of this project was to demonstrate that it was possible to produce an S-like environment which did not suffer from the memory-demands and performance problems which S has. It is only more recently that we have started trying to turn R into a "real" system. In the short term we hope to create a small portable free system which will provide most of the functionality of S and some extensions. R is being converted to GNU coding standards. Sincerely, The R Core Team.