The current implementation handles three modes: numeric, alphanumeric and
byte.
Kanji is currently not supported.
Please contact the maintainer if you need it.
Numeric: only digits from 0 to 9
Alphanumeric: all numeric characters, upper case LETTERS, and the
characters " " (space), "$", "%", "*", "+", "-", ".", "/" and
":"
Byte: All characters from the Latin 1 (ISO 8859-1) character set.
Input strings with an other encoding are converted into Latin 1.
The function return an error if such conversion fails.
qr_mode(x)the input string
a character indicating the mode
Other internal:
qr_encode(),
qr_error(),
qr_matrix(),
qr_version()
qr_mode("0123")
#> [1] "Numeric"
qr_mode("A")
#> [1] "Alphanumeric"
qr_mode("a")
#> [1] "Byte"