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Array elements that are prime numbers.
isprime(x)
Returns an array (or vector) the same size as x containing logical 1 (true) for the elements of x which are prime, and logical 0 (false) otherwise.
x
true
false
numeric vector or matrix containing nonnegative integer values
H. Borchers hwborchers@googlemail.com, P. Roebuck proebuck1701@gmail.com
factors, primes
factors
primes
x <- c(2, 3, 0, 6, 10) ans <- isprime(x) ## 1, 1, 0, 0, 0 as.logical(ans) ## true, true, false, false, false
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