Checks whether elements of a numeric vector are odd integers.
Value
a logical vector of the same length as x. Returns TRUE
for odd integers, FALSE for even integers, and NA for
non-integer or non-finite values.
Details
The function first checks whether values are finite integers. Non-integer
values (e.g. 3.5), NA, NaN, or Inf return NA.
A bare logical NA is accepted and treated as a missing numeric value.
See also
Other number.theory:
GCD-LCM,
digitSum(),
divisors(),
factorize(),
fibonacci(),
isPrime(),
primes()
Examples
isOdd(1:5)
#> [1] TRUE FALSE TRUE FALSE TRUE
isOdd(c(2, 3, 4.5, NA, Inf))
#> [1] FALSE TRUE NA NA NA