matlab (version 1.0.2)

isprime: MATLAB isprime function

Description

Array elements that are prime numbers.

Usage

isprime(x)

Arguments

x

numeric vector or matrix containing nonnegative integer values

Value

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.

See Also

factors, primes

Examples

x <- c(2, 3, 0, 6, 10)
ans  <- isprime(x)	## 1, 1, 0, 0, 0
as.logical(ans)         ## true, true, false, false, false