check_n function

Check Whole Number

Check that n is finite, non-NA scalar that is an integer or integerish (ie is equal to round(n)), and optionally within a specified range and divisible by a specified number.

check_n(n, nm_n, min, max, divisible_by)

Arguments

• n: A whole number
• nm_n: Name for 'n' to be used in error messages
• min: Minimum value 'n' can take. Can be NULL.
• max: Maximum values 'n' can take. Can be NULL.
• divisible_by: 'n' must be divisible by this. Can be NULL.

Returns

If all tests pass, check_n() returns TRUE invisibly. Otherwise it throws an error.

Examples

check_n(10, nm_n = "count", min = 0, max = NULL, divisible_by = 1)
check_n(10, nm_n = "count", min = NULL, max = NULL, divisible_by = NULL)
check_n(10, nm_n = "n", min = 5, max = 10, divisible_by = 2)