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# stri_replace_na: Replace Missing Values in a Character Vector

## Description

This function gives a convenient way to replace each missing (`NA`) value with a given string.

## Usage

    stri_replace_na(str, replacement = "NA")

## Arguments

`str` | character vector or an object coercible to
`replacement` | single string

## Details

This function is roughly equivalent to `str2 <- stri_enc_toutf8(str); str2[is.na(str2)] <- stri_enc_toutf8(replacement); str2`. It may be used, e.g., wherever the ‘plain R’ `NA` handling is desired, see Examples.

## Value

Returns a character vector.

## Author(s)

Marek Gagolewski and other contributors

## See Also

The official online manual of stringi at https://stringi.gagolewski.com/

Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, doi:10.18637/jss.v103.i02

Other utils: `stri_list2matrix()`, `stri_na2empty()`, `stri_remove_empty()`

## Examples

    x <- c('test', NA)
    stri_paste(x, 1:2)                           # 'test1' NA
    ## [1] "test1" NA
    paste(x, 1:2)                                # 'test 1' 'NA 2'
    ## [1] "test 1" "NA 2"
    stri_paste(stri_replace_na(x), 1:2, sep=' ') # 'test 1' 'NA 2'
    ## [1] "test 1" "NA 2"