chk Families

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chk Families

The chk_ functions (and their vld_ equivalents) can be divided into the following families. For reasons of space, the x_name = NULL argument is not shown.

Check Logical

Function	Code
`chk_true(x)`	`is.logical(x) && length(x) == 1L && !anyNA(x) && x`
`chk_false(x)`	`is.logical(x) && length(x) == 1L && !anyNA(x) && !x`
`chk_flag(x)`	`is.logical(x) && length(x) == 1L && !anyNA(x)`
`chk_lgl(x)`	`is.logical(x) && length(x) == 1L`

Check Scalars

Function	Code
`chk_scalar(x)`	`length(x) == 1L`
`chk_number(x)`	`is.numeric(x) && length(x) == 1L && !anyNA(x)`
`chk_whole_number(x)`	`vld_number(x) && (is.integer(x) \|\| vld_true(all.equal(x, trunc(x))))`
`chk_string(x)`	`is.character(x) && length(x) == 1L && !anyNA(x)`
`chk_date(x)`	`inherits(x, "Date") && length(x) == 1L && !anyNA(x)`
`chk_datetime(x)`	`inherits(x, "POSIXct") && length(x) == 1L && !anyNA(x)`
`chk_tz(x)`	`is.character(x) && length(x) == 1L && !anyNA(x) && x %in% OlsonNames()`

Check Ranges

Function	Code
`chk_range(x, range = c(0, 1))`	`all(x[!is.na(x)] >= range[1] & x[!is.na(x)] <= range[2])`
`chk_lt(x, value = 0)`	`all(x[!is.na(x)] < value)`
`chk_lte(x, value = 0)`	`all(x[!is.na(x)] <= value)`
`chk_gt(x, value = 0)`	`all(x[!is.na(x)] > value)`
`chk_gte(x, value = 0)`	`all(x[!is.na(x)] >= value)`

Check Equals

Function	Code
`chk_identical(x, y)`	`identical(x, y)`
`chk_equal(x, y, tolerance = sqrt(.Machine$double.eps))`	`vld_true(all.equal(x, y, tolerance))`
`chk_equivalent(x, y, tolerance = sqrt(.Machine$double.eps))`	`vld_true(all.equal(x, y, tolerance, check.attributes = FALSE))`

Check Alls

Function	Code
`chk_all(x, chk_fun, ...)`	`all(vapply(x, chk_fun, TRUE, ...))`
`chk_all_identical(x)`	`length(x) < 2L \|\| all(vapply(x, vld_identical, TRUE, y = x[[1]]))`
`chk_all_equal(x, tolerance = sqrt(.Machine$double.eps))`	`length(x) < 2L \|\| all(vapply(x, vld_equal, TRUE, y = x[[1]], tolerance = tolerance))`
`chk_all_equivalent(x, tolerance = sqrt(.Machine$double.eps))`	`length(x) < 2L \|\| all(vapply(x, vld_equivalent, TRUE, y = x[[1]], tolerance = tolerance))`

Check Set

Function	Code
`chk_setequal(x, values)`	`setequal(x, values)`
`chk_subset(x, values)`	`all(x %in% values)`
`chk_superset(x, values)`	`all(values %in% x)`
`chk_join(x, y, by)`	`identical(nrow(x), nrow(merge(x, unique(y[if (is.null(names(by))) by else names(by)]), by = by)))`

Check Is

Function	Code
`chk_atomic(x)`	`is.atomic(x)`
`chk_function(x, formals = NULL)`	`is.function(x) && (is.null(formals) \|\| length(formals(x)) == formals)`
`chk_numeric(x)`	`is.numeric(x)`
`chk_s3_class(x, class)`	`!isS4(x) && inherits(x, class)`
`chk_s4_class(x, class)`	`isS4(x) && methods::is(x, class)`
`chk_vector(x)`	`is.vector(x)`
`chk_whole_numeric(x)`	`is.integer(x) \|\| (is.double(x) && vld_true(all.equal(x, as.integer(x))))`
`chk_array(x)`	`is.array(x)`
`chk_matrix(x)`	`is.matrix(x)`
`chk_data(x)`	`inherits(x, "data.frame")`

Check Typeof

Function	Code
`chk_environment(x)`	`is.environment(x)`
`chk_list(x)`	`is.list(x)`
`chk_logical(x)`	`is.logical(x)`
`chk_double(x)`	`is.double(x)`
`chk_integer(x)`	`is.integer(x)`
`chk_character(x)`	`is.character(x)`

Check NULLs

Function	Code
`chk_null(x)`	`is.null(x)`
`chk_not_null(x)`	`!is.null(x)`

Check Ellipsis

Function	Code
`chk_used(...)`	`length(list(...)) != 0L`
`chk_unused(...)`	`length(list(...)) == 0L`

Check Files

Function	Code
`chk_file(x)`	`vld_string(x) && file.exists(x) && !dir.exists(x)`
`chk_ext(x, ext)`	`vld_string(x) && vld_subset(tools::file_ext(x), ext)`
`chk_dir(x)`	`vld_string(x) && dir.exists(x)`

Check Miscellaneous

Function	Code
`chk_match(x, regexp = ".+")`	`all(grepl(regexp, x[!is.na(x)]))`
`chk_named(x)`	`!is.null(names(x))`
`chk_not_empty(x)`	`length(x) != 0L`
`chk_not_any_na(x)`	`!anyNA(x)`
`chk_unique(x, incomparables = FALSE)`	`!anyDuplicated(x, incomparables = incomparables)`
`chk_sorted(x)`	`is.unsorted(x)`

Check

Function
check_data(x, values = NULL, exclusive = FALSE, order = FALSE, nrow = numeric(0), key = character(0))

check_dim(x, dim = length, values = numeric(0), dim_name = NULL)

check_key(x, key = character(0), na_distinct = FALSE)

check_names(x, names = character(0), exclusive = FALSE, order = FALSE)

check_values(x, values)

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They may not be fully stable and should be used with caution. We make no claims about them.