Check if an argument is a single numeric value

Check if an argument is a single numeric value

checkNumber(
  x,
  na.ok = FALSE,
  lower = -Inf,
  upper = Inf,
  finite = FALSE,
  null.ok = FALSE
)

check_number(
  x,
  na.ok = FALSE,
  lower = -Inf,
  upper = Inf,
  finite = FALSE,
  null.ok = FALSE
)

assertNumber(
  x,
  na.ok = FALSE,
  lower = -Inf,
  upper = Inf,
  finite = FALSE,
  null.ok = FALSE,
  .var.name = vname(x),
  add = NULL
)

assert_number(
  x,
  na.ok = FALSE,
  lower = -Inf,
  upper = Inf,
  finite = FALSE,
  null.ok = FALSE,
  .var.name = vname(x),
  add = NULL
)

testNumber(
  x,
  na.ok = FALSE,
  lower = -Inf,
  upper = Inf,
  finite = FALSE,
  null.ok = FALSE
)

test_number(
  x,
  na.ok = FALSE,
  lower = -Inf,
  upper = Inf,
  finite = FALSE,
  null.ok = FALSE
)

expect_number(
  x,
  na.ok = FALSE,
  lower = -Inf,
  upper = Inf,
  finite = FALSE,
  null.ok = FALSE,
  info = NULL,
  label = vname(x)
)

Arguments

x

[any]
Object to check.

na.ok

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

lower

[numeric(1)]
Lower value all elements of x must be greater than or equal to.

upper

[numeric(1)]
Upper value all elements of x must be lower than or equal to.

finite

[logical(1)]
Check for only finite values? Default is FALSE.

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

assertNumber/assert_number return

x invisibly, whereas

checkNumber/check_number and

testNumber/test_number return

TRUE. If the check is not successful,

assertNumber/assert_number

throws an error message,

testNumber/test_number

returns FALSE, and checkNumber/check_number

return a string with the error message. The function expect_number always returns an

expectation.

Details

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

See also

Other scalars: checkCount(), checkFlag(), checkInt(), checkScalarNA(), checkScalar(), checkString()

Examples

testNumber(1)
#> [1] TRUE
testNumber(1:2)
#> [1] FALSE