stri_enc_toascii: Convert To ASCII


This function converts input strings to ASCII, i.e., to character strings consisting of bytes not greater than 127.





a character vector to be converted


All code points greater than 127 are replaced with the ASCII SUBSTITUTE CHARACTER (0x1A). R encoding declarations are always used to determine which encoding is assumed for each input, see stri_enc_mark. If ill-formed byte sequences are found in UTF-8 byte streams, a warning is generated.

A bytes-marked string is assumed to be in an 8-bit encoding extending the ASCII map (a common assumption in R itself).

Note that the SUBSTITUTE CHARACTER (\x1a == \032) may be interpreted as the ASCII missing value for single characters.


Returns a character vector.


Marek Gagolewski and other contributors

See Also

The official online manual of stringi at

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 encoding_conversion: about_encoding, stri_enc_fromutf32(), stri_enc_tonative(), stri_enc_toutf32(), stri_enc_toutf8(), stri_encode()