recodeValues: Recode or Replace Values With New Values
In danielmarcelino/SciencesPo: A Tool Set for Analyzing Political Behavior Data

Recodes a value or a vector of values.

1	recodeValues(x, old, new, warn = TRUE)

`x`	The vector whose values will be recoded.
`old`	the old value or a vector of old values (numeric/factor/string).
`new`	the new value or a vector of replacement values (1 to 1 recoding).
`warn`	A logical to print a message if any of the old values are not actually present in `x`.

x <- LETTERS[1:5]
recodeValues(x, c("B", "D"), c("Beta", "Delta"))

# On numeric vectors
x <- c(1, 4, 5, 9)
recodeValues(x, old = c(1, 4, 5, 9), new = c(10, 40, 50, 90))