R: Check names to comply to specific rules

checkNames {checkmate} | R Documentation

## Check names to comply to specific rules

### Description

Similar to `checkNamed` but you can pass the names directly.

### Usage

    checkNames(x, type = "named", permutation.of = NULL, subset.of = NULL,
      identical.to = NULL)

    check_names(x, type = "named", permutation.of = NULL, subset.of = NULL,
      identical.to = NULL)

    assertNames(x, type = "named", permutation.of = NULL, subset.of = NULL,
      identical.to = NULL, .var.name = vname(x), add = NULL)

    assert_names(x, type = "named", permutation.of = NULL, subset.of = NULL,
      identical.to = NULL, .var.name = vname(x), add = NULL)

    testNames(x, type = "named", permutation.of = NULL, subset.of = NULL,
      identical.to = NULL)

    test_names(x, type = "named", permutation.of = NULL, subset.of = NULL,
      identical.to = NULL)

    expect_names(x, type = "named", permutation.of = NULL, subset.of = NULL,
      identical.to = NULL, info = NULL, label = vname(x))

### Arguments

`x` | [`character` || `NULL`] Names to check using rules defined via `type`.
`type` | [character(1)] Type of formal check(s) to perform on the names. “unnamed” checks `x` to be `NULL`. “named” (default) checks `x` for regular names which excludes names to be `NA` or empty (`""`). “unique” additionally tests for non-duplicated names. “strict” checks for unique names which comply to R's variable name restrictions. Note that for zero-length `x` all these name checks evaluate to `TRUE`.
`permutation.of` | [`character`] Names provided in `x` must be a permutation of the set `permutation.of`. Duplicated names in `permutation.of` are stripped out and duplicated names in `x` thus lead to a failed check. Use this argument instead of `identical.to` if the order of the names is not relevant.
`subset.of` | [`character`] Names provided in `x` must be subset of the set `subset.of`. Use this argument if duplicated names are okay.
`identical.to` | [`character`] Names provided in `x` must be identical to the vector `identical.to`. Use this argument instead of `permutation.of` if the order of the names is relevant.
`.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 `assertNamed`/`assert_named` return `x` invisibly, whereas `checkNamed`/`check_named` and `testNamed`/`test_named` return `TRUE`. If the check is not successful, `assertNamed`/`assert_named` throws an error message, `testNamed`/`test_named` returns `FALSE`, and `checkNamed` returns a string with the error message. The function `expect_named` always returns an `expectation`.

### See Also

Other attributes: `checkClass`, `checkNamed`

### Examples

    x = 1:3
    testNames(x, "unnamed")
    names(x) = letters[1:3]
    testNames(x, "unique")

    cn = c("Species", "Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width")
    assertNames(names(iris), permutation.of = cn)

[Package checkmate version 1.8.2 Index]