Rmpfr (version 0.9-5)

is.whole: Whole ("Integer") Numbers

Description

Check which elements of x[] are integer valued aka “whole” numbers,including MPFR numbers (class mpfr).

Usage

# S3 method for mpfr
is.whole(x)

Value

logical vector of the same length as x, indicating where

x[.] is integer valued.

Arguments

x

any R vector, here of class mpfr.

Author

Martin Maechler

See Also

is.integer(x) (base package) checks for the internal mode or class, not if x[i] are integer valued.

The is.whole() methods in package gmp.

Examples

 is.integer(3) # FALSE, it's internally a double
 is.whole(3)   # TRUE
 x <- c(as(2,"mpfr") ^ 100, 3, 3.2, 1000000, 2^40)
 is.whole(x) # one FALSE, only
# \dontshow{
xt <- c(x, as.bigz(2)^120, as.bigq(3,1:3))
stopifnot(identical(is.whole(x), (1:5)!=3), is(xt, "mpfr"),
          identical(is.whole(xt), is.na(match(1:9, c(3,8)))))
# }