Constants {base} | R Documentation |
Constants built into R.
LETTERS
letters
month.abb
month.name
pi
R has a small number of built-in constants.
The following constants are available:
LETTERS
: the 26 upper-case letters of the Roman
alphabet;
letters
: the 26 lower-case letters of the Roman
alphabet;
month.abb
: the three-letter abbreviations for the
English month names;
month.name
: the English names for the months of the
year;
pi
: the ratio of the circumference of a circle to its
diameter.
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.
## John Machin (ca 1706) computed pi to over 100 decimal places
## using the Taylor series expansion of the second term of
pi - 4*(4*atan(1/5) - atan(1/239))
## months in English
month.name
## months in your current locale
format(ISOdate(2000, 1:12, 1), "%B")
format(ISOdate(2000, 1:12, 1), "%b")