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checkmate (version 1.8.1)

checkScalarNA: Check if an argument is a single missing value

Description

Check if an argument is a single missing value

Usage

checkScalarNA(x, null.ok = FALSE)


check_scalar_na(x, null.ok = FALSE)


assertScalarNA(x, null.ok = FALSE, .var.name = vname(x), add = NULL)


assert_scalar_na(x, null.ok = FALSE, .var.name = vname(x), add = NULL)


testScalarNA(x, null.ok = FALSE)


test_scalar_na(x, null.ok = FALSE)


expect_scalar_na(x, null.ok = FALSE, info = NULL, label = vname(x))

Arguments

x
[any] Object to check.
null.ok
[logical(1)] If set to TRUE, x may also be NULL. In this case only a type check of x is performed, all additional checks are disabled.
.var.name
[character(1)] Name of the checked object to print in assertions. Defaults to the heuristic implemented in vname.
add
[AssertCollection] Collection to store assertion messages. See AssertCollection.
info
[character(1)] Extra information to be included in the message for the testthat reporter. See expect_that.
label
[character(1)] Name of the checked object to print in messages. Defaults to the heuristic implemented in vname.

Value

Depending on the function prefix: If the check is successful, the functions return TRUE. If the check is not successful, assertScalarNA/assert_scalar_na throws an error message, testScalarNA/test_scalar_na returns FALSE, and checkScalarNA returns a string with the error message. The function expect_scalar_na always returns an expectation.

See Also

Other scalars: checkCount, checkFlag, checkInt, checkScalar, checkString

Examples

Run this code
testScalarNA(1)
testScalarNA(NA_real_)
testScalarNA(rep(NA, 2))

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