Count the total values of `x`

that are `%in%`

the vector `y`

.

`count_in(x, y, na.rm = TRUE, ignore.case = FALSE)`

## Arguments

- x
A vector to check.

- y
A vector to compare against.

- na.rm
logical; Should `NA`

be ignored?

- ignore.case
logical; if `FALSE`

, the pattern matching is case
sensitive and if `TRUE`

, case is ignored during matching.

## Value

The sum of `x`

present in `y`

.

## See also

Other counting wrappers:
`count_diff()`

,
`count_na()`

,
`count_out()`

,
`na_in()`

,
`na_out()`

,
`na_rep()`

,
`prop_distinct()`

,
`prop_in()`

,
`prop_na()`

,
`prop_out()`

,
`what_in()`

,
`what_out()`

## Examples

```
count_in(c("VT", "NH", "ZZ", "ME"), state.abb)
#> [1] 3
```