checkmate (version 1.0)

checkCount: Check if an argument is a count

Description

A count is a non-negative integerish value.

Usage

checkCount(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps))
assertCount(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), .var.name)
testCount(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps))

Arguments

x

[ANY] Object to check.

.var.name

[character(1)] Name for x. Defaults to a heuristic to determine the name using deparse and substitute.

na.ok

[logical(1)] Are missing values allowed? Default is FALSE.

positive

[logical(1)] Must x be positive (>= 1)? Default is FALSE, allowing 0.

tol

[double(1)] Numerical tolerance used to check whether a double or complex can be converted. Default is sqrt(.Machine$double.eps).

Value

• Depending on the function prefix: If the check is successful, all functions return TRUE. If the check is not successful, assertCount throws an error message, testCount returns FALSE and checkCount returns a string with the error message.

Details

This function does not distinguish between NA, NA_integer_, NA_real_, NA_complex_ NA_character_ and NaN.

See Also

Other scalars: assertFlag, checkFlag, testFlag; assertInt, checkInt, testInt; assertNumber, checkNumber, testNumber; assertScalarNA, checkScalarNA, testScalarNA; assertScalar, checkScalar, testScalar; assertString, checkString, testString

Examples

testCount(1)
 testCount(-1)