Constants built into R.
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R has a small number of built-in constants.
The following constants are available:
LETTERS: the 26 upper-case letters of the Roman
letters: the 26 lower-case letters of the Roman
month.abb: the three-letter abbreviations for the
English month names;
month.name: the English names for the months of the
pi: the ratio of the circumference of a circle to its
These are implemented as variables in the base namespace taking appropriate values.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
Quotes for the parsing of character constants,
NumericConstants for numeric constants.
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