The polybius square is a device which associates
each letter to a pair of coordinates. The letter J is excluded and replaced
with I in order to get 25 letters and create a 5x5 matrix.
Usage
polybius(input, decrypt = FALSE)
Value
a string
Arguments
input
Word or phrase to be encrypted,
or character vector with the sequence of coordinate numbers if we need to decrypt
decrypt
If `FALSE` (default), the program ciphers the input word, If `TRUE`, the program decrypts it.