| Constants {base} | R Documentation |
Built-in Constants
Usage
LETTERS
letters
month.abb
month.name
pi
Value
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 == substr(month.name, 1, 3)) # TRUE
eps <- .Machine$double.eps
all.equal(pi, 4*atan(1), tol= 2*eps)
# John Machin (1705) computed 100 decimals of pi :
all.equal(pi/4, 4*atan(1/5) - atan(1/239), 4*eps)