alpha2int | R Documentation |
Simple conversion functions for discrete data (e.g., time series),
between 0:k
integers and single letter characters.
alpha2int(x, alpha)
int2alpha(i, alpha)
x |
character vector of single letters. |
alpha |
the alphabet, as one character string. |
i |
integer vector of numbers in |
alpha2int(x,*)
returns an integer
vector of the same
length as x
, consisting of values from 0:k
where
k + 1
is the length of the alphabet, nchar(alpha)
.
int2alpha(i,*)
returns a vector of single letter
character
of the same length as i
.
vlmc
, and
int2char()
and its inverse, char2int()
,
both working with multi-character strings instead of vectors of single
characters; further, alphabet
.
alphabet <- "abcdefghijk"
(ch <- sample(letters[1:10], 30, replace = TRUE))
(ic <- alpha2int(ch, alphabet))
stopifnot(int2alpha(ic, alphabet) == ch)
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