R: Flatten a String

stri_flatten {stringi} | R Documentation

## Flatten a String

### Description

Joins the elements of a character vector into one string.

### Usage

    stri_flatten(str, collapse = "", na_empty = FALSE, omit_empty = FALSE)

### Arguments

`str` | a vector of strings to be coerced to character
`collapse` | a single string denoting the separator
`na_empty` | single logical value; should missing values in `str` be treated as empty strings?
`omit_empty` | single logical value; should missing values in `str` be omitted?

### Details

The `stri_flatten(str, collapse='XXX')` call is equivalent to `paste(str, collapse='XXX', sep="")`.

If you wish to use some more fancy (e.g., differing) separators between flattened strings, call `stri_join(str, separators, collapse='')`.

If `str` is not empty, then a single string is returned. If `collapse` has length > 1, then only the first string will be used.

### Value

Returns a single string, i.e., a character vector of length 1.

### See Also

Other join: `%s+%()`, `stri_dup()`, `stri_join_list()`, `stri_join()`

### Examples

    stri_flatten(LETTERS)
    stri_flatten(LETTERS, collapse=",")
    stri_flatten(stri_dup(letters[1:6], 1:3))
    stri_flatten(c(NA, "", "A", "", "B", NA, "C"), collapse=",", na_empty=TRUE, omit_empty=TRUE)

[Package stringi version 1.4.6 Index]