Number of discrete values in a series — num

Return the number of discrete values in x that lie between from and to, or test whether the number of discrete values is infinite.

Usage

num_discretes(
  x,
  from = -Inf,
  to = Inf,
  ...,
  include_from = TRUE,
  include_to = TRUE,
  tol = sqrt(.Machine$double.eps)
)

Arguments

x: Numeric series (numeric vector or object of class "discretes").
from, to: Reference values, possibly infinite. from must be less than or equal to to; both must be length-1 numeric vectors.
...: Reserved for future extensions; must be empty.
include_from, include_to: Should the from value be included in the query? Should the to value? Both must be length-1 logical vectors.
tol: Numerical tolerance when checking if a value is in the series. Single non-negative numeric. See next_discrete() for details.

Value

For num_discretes(), a single non-negative integer, or possibly Inf for infinitely many discrete values.

Examples

num_discretes(-3:3)
#> [1] 7
num_discretes(c(0.4, 0.4, 0.4, 0))
#> [1] 2

x <- arithmetic(-3.2, spacing = 0.5)
num_discretes(x)
#> [1] Inf
num_discretes(x, from = -2, to = 2)
#> [1] 8
num_discretes(1 / x, from = -2, to = 2)
#> [1] Inf