Built-in Constants

Description

Constants built into R.

Usage

LETTERS
letters
month.abb
month.name
pi

Details

R has a limited number of built-in constants (there is also a rather larger library of data sets which can be loaded with the function data).

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.

References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

See Also

data, DateTimeClasses.

Quotes for the parsing of character constants, NumericConstants for numeric constants.

Examples

# John Machin (1705) computed 100 decimals of pi :
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")