Convenience operator for checking if an example is not in a set of elements

Check whether an object is absent from a table, i.e., the logical inverse of in. See examples on how missing values are being handled.

x %notin% table

Arguments

x

Vector or NULL: the values to be matched.

table

Vector or NULL: the values to be matched against.

Value

Logical vector, TRUE for each element of x absent from table, and FALSE for each element of x present in table.

See also

match, chmatch

Examples

  11 %notin% 1:10 # TRUE
#> [1] TRUE
  "a" %notin% c("a", "b") # FALSE
#> [1] FALSE

  ## NAs on the LHS
  NA %in% 1:2
#> [1] FALSE
  NA %notin% 1:2
#> [1] TRUE
  ## NAs on the RHS
  NA %in% c(1:2,NA)
#> [1] TRUE
  NA %notin% c(1:2,NA)
#> [1] FALSE