isRational | R Documentation |
Test if an object is of class "rationalS3", "rationalS4", or "rationalR6"
is.rationalS3(e1, inherit = FALSE)
is.rationalR6(e1, inherit = FALSE)
is.rationalS4(e1, inherit = FALSE)
is.rational(e1, inherit = FALSE)
e1 |
object to be tested |
inherit |
should inheritence be checked? default= |
The inherit
parameter is included for speed. There is a
performance boost from not checking for inheritence in the class structure.
When inherit==FALSE
, the the first class returned from class()
is
checked to be equal to "rationalXX". When inherit==TRUE
, then the
methods::is()
function is used.
stopifnot(is.rationalS3(rational(1L, 2L, "S3")))
stopifnot(!is.rationalS3(7.1))
stopifnot(is.rationalR6(rational(1L, 2L, "R6")))
stopifnot(!is.rationalR6("no"))
stopifnot(is.rationalS4(rational(1L, 2L, "S4")))
stopifnot(!is.rationalS4(TRUE))
stopifnot(is.rational(rational(1L, 2L, "S3")))
stopifnot(!is.rational(7.1))
stopifnot(is.rational(rational(1L, 2L, "R6")))
stopifnot(is.rational(rational(1L, 2L, "S4")))
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