Check if an argument is a count

Share:

Description

A count is defined as non-negative integerish value.

Usage

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
checkCount(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), null.ok = FALSE)

check_count(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), null.ok = FALSE)

assertCount(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), null.ok = FALSE, .var.name = vname(x),
  add = NULL)

assert_count(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), null.ok = FALSE, .var.name = vname(x),
  add = NULL)

testCount(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), null.ok = FALSE)

test_count(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), null.ok = FALSE)

expect_count(x, na.ok = FALSE, positive = FALSE,
  tol = sqrt(.Machine$double.eps), 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.

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).

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.

Details

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

Value

Depending on the function prefix: If the check is successful, the functions assertCount/assert_count return x invisibly, whereas checkCount/check_count and testCount/test_count return TRUE. If the check is not successful, assertCount/assert_count throws an error message, testCount/test_count returns FALSE, and checkCount returns a string with the error message. The function expect_count always returns an expectation.

See Also

Other scalars: checkFlag, checkInt, checkNumber, checkScalarNA, checkScalar, checkString

Examples

1
2
testCount(1)
testCount(-1)

Want to suggest features or report bugs for rdrr.io? Use the GitHub issue tracker.