num_vec {dataclass}

Validator: Check if element is a number

Description

This function is used to check whether something is a number. You can use this function to check the length and min-max of a number vector. You can also specify the level of a violation. If level is set to "warn" then invalid inputs will warn you. However, if level is set to "error" then invalid inputs will abort.

Usage

num_vec(
  max_len = Inf,
  min_len = 1,
  max_val = Inf,
  min_val = -Inf,
  allowed = NA,
  level = "error",
  allow_na = FALSE,
  allow_dups = TRUE
)

Arguments

max_len

The maximum length of a numeric element

min_len

The minimum length of a numeric element

max_val

The maximum value of a numeric element

min_val

The minimum value of a numeric element

allowed

A vector of allowable values

level

Setting "warn" throws a warning, setting "error" halts

allow_na

Should NA values be allowed?

allow_dups

Should duplicates be allowed?

Value

A function with the following properties:

* Checks whether something is a number vector * Determines whether the check will throw warning or error * Optionally checks for element length * Optionally checks for allowable values * Optionally checks for max/min

Examples

# Define a dataclass for testing numbers:
my_dataclass <-
  dataclass(
    dte_val = dte_vec(),
    # Setting warn means a warning will occur if violation is found
    # The default is "error" which is stricter and will halt upon violation
    # We also set allowed to 0 and 1 which means elements must be 0 or 1
    num_val = num_vec(level = "warn", allowed = c(0, 1))
  )

# While `dte_val` must be a date, `num_val` must be 0 or 1!
my_dataclass(
  dte_val = Sys.Date(),
  num_val = c(0, 1, 1, 0, 1)
)

my_dataclass(
  dte_val = Sys.Date(),
  num_val = 1
)

# Set min and max requirements!
test_dataclass <-
  dataclass(
    num = num_vec(min_val = 1, max_val = 100)
  )

# Value must be between 1 and 10 inclusive!
test_dataclass(num = 10.03012)