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Convert a integer into a corresponding letter or multi-letter string

Source: R/as_numbered_labels.R
int_to_alpha.Rd

Character values in the provided dict (default to letters "A" to "Z") are passed as is. Non-integer numeric values or characters that are not found in the provided dict are converting to NA values.

Usage

int_to_alpha(x, suffix = NULL, base = 26, dict = LETTERS, quiet = TRUE)

Source

Adapted from the recursive solution provided by G. Grothendieck in a May 31, 2017 StackOverflow answer.

Arguments

x

An integer vector or a vector that can be coerced to an integer vector

suffix

Suffix character to follow alpha character, e.g. if x = 1 and suffix = "." the returned label would be "A.". suffix is also used to separate values when x is greater than base, e.g. x = 27 and suffix = "." returns "A.A." Defaults to NULL.

base

If base is not numeric, it is converted to an integer with alpha_to_int().

dict

Character vector to compare to x. Default: LETTERS.

quiet

If TRUE, suppress warnings for introduction of NA values through coercion.

Value

An integer vector composed of objects between 1 and 26 with the same length as x.