stringi (version 1.0-1)

stri_length: 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

Value

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

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.

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