Count Total Missing (NA) Values

Calculates the total number of missing values across a vector, matrix, or data frame, optionally treating additional values (e.g. "NA" as a literal string, or "") as missing too.

Usage

count_na(x, na_list = NULL)

Arguments

x

A vector, matrix, or data frame.

na_list

Optional vector of additional values to treat as missing, beyond actual NA.

Value

An integer representing the total count of missing values.

Examples

count_na(c(1, 2, NA, 4, NA))
#> [1] 2
count_na(data.frame(a = c(1, NA), b = c(NA, 2)))
#> [1] 2
count_na(c(1, NA, "NA", 4), na_list = "NA")
#> [1] 2