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Built-in Constants

Syntax

LETTERS
letters
month.abb
month.name
pi

Values

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.

See Also

data.

Examples

all(nchar(letters) == 1)# TRUE all(month.abb == substring(month.name,1,3))# TRUE