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R is an integrated suite of software facilities for data manipulation,
calculation and graphical display. Among other things it has
* an effective data handling and storage facility,
* a suite of operators for calculations on arrays, in particular
matrices,
* a large, coherent, integrated collection of intermediate tools for
data analysis,
* graphical facilities for data analysis and display either directly
at the computer or on hardcopy, and
* a well developed, simple and effective programming language (called
`S') which includes conditionals, loops, user defined recursive
functions and input and output facilities. (Indeed most of the
system supplied functions are themselves written in the S
language.)
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