stri_length {stringi} | R Documentation

## Count the Number of Code Points

### Description

This function returns the number of code points in each string.

### Usage

    stri_length(str)

### Arguments

`str` | character vector or an object coercible to

### Details

Note that the number of code points is not the same as the 'width' of the string when printed on the screen.

If a given string is in UTF-8 and has not been properly normalized (e.g. by `stri_trans_nfc`), the returned counts may sometimes be misleading. See `stri_count_boundaries` for a method to count Unicode characters. Moreover, if an incorrect UTF-8 byte sequence is detected, then a warning is generated and the corresponding output element is set to `NA`, see also `stri_enc_toutf8` for a method to deal with such cases.

Missing values are handled properly, as opposed to the built-in `nchar` function. For 'byte' encodings we get, as usual, an error.

### Value

Returns an integer vector of the same length as `str`.

### See Also

Other length: `stri_isempty`, `stri_numbytes`, `stri_width`

### Examples

    stri_length(LETTERS)
    stri_length(c('abc', '123', '\u0105\u0104'))
    stri_length('\u0105') # length is one, but...
    stri_numbytes('\u0105') # 2 bytes are used
    stri_numbytes(stri_trans_nfkd('\u0105')) # 3 bytes here but...
    stri_length(stri_trans_nfkd('\u0105')) # ...two code points (!)
    stri_count_boundaries(stri_trans_nfkd('\u0105'), type="character") # ...and one Unicode character

[Package stringi version 1.1.5 Index]