checkSubset: Check if an argument is a subset of a given set
In checkmate: Fast and Versatile Argument Checks

checkSubset

R Documentation

Check if an argument is a subset of a given set

Description

Check if an argument is a subset of a given set

Usage

checkSubset(x, choices, empty.ok = TRUE, fmatch = FALSE)

check_subset(x, choices, empty.ok = TRUE, fmatch = FALSE)

assertSubset(
  x,
  choices,
  empty.ok = TRUE,
  fmatch = FALSE,
  .var.name = vname(x),
  add = NULL
)

assert_subset(
  x,
  choices,
  empty.ok = TRUE,
  fmatch = FALSE,
  .var.name = vname(x),
  add = NULL
)

testSubset(x, choices, empty.ok = TRUE, fmatch = FALSE)

test_subset(x, choices, empty.ok = TRUE, fmatch = FALSE)

expect_subset(
  x,
  choices,
  empty.ok = TRUE,
  fmatch = FALSE,
  info = NULL,
  label = vname(x)
)

Arguments

`x`	[any] Object to check.
`choices`	[`atomic`] Set of possible values. May be empty.
`empty.ok`	[`logical(1)`] Treat zero-length `x` as subset of any set `choices` (this includes `NULL`)? Default is `TRUE`.
`fmatch`	[`logical(1)`] Use the set operations implemented in `fmatch` in package fastmatch. If fastmatch is not installed, this silently falls back to `match`. `fmatch` modifies `y` by reference: A hash table is added as attribute which is used in subsequent calls.
`.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 assertSubset/assert_subset return x invisibly, whereas checkSubset/check_subset and testSubset/test_subset return TRUE. If the check is not successful, assertSubset/assert_subset throws an error message, testSubset/test_subset returns FALSE, and checkSubset/check_subset return a string with the error message. The function expect_subset always returns an expectation.

Note

The object x must be of the same type as the set w.r.t. typeof. Integers and doubles are both treated as numeric.

Examples

testSubset(c("a", "z"), letters)
testSubset("ab", letters)
testSubset("Species", names(iris))

# x is not converted before the comparison (except for numerics)
testSubset(factor("a"), "a")
testSubset(1, "1")
testSubset(1, as.integer(1))

checkmate documentation built on Oct. 25, 2023, 5:06 p.m.