| is.recursive {base} | R Documentation |
Is an Object Atomic or Recursive?
Description
is.atomic returns TRUE if x
does not have a list structure and FALSE otherwise.
is.recursive returns TRUE if x has a recursive
(list-like) structure and FALSE otherwise.
Usage
is.atomic(x)
is.recursive(x)
Arguments
x |
object to be tested. |
See Also
is.list, is.language, etc, and the
demo("is.things").
Examples
is.a.r <- function(x) c(is.atomic(x), is.recursive(x))
is.a.r(c(a=1,b=3))# TRUE FALSE
is.a.r(list()) # FALSE TRUE ??
is.a.r(list(2)) # FALSE TRUE
is.a.r(lm) # "
is.a.r(y ~ x) # "
is.a.r(expression(x+1))# should be F-T (not in 0.62.3!)