replace a list of values by another in R

Question

I have a dataframe with any of these values.

from=c(\"A\",\"C\",\"G\",\"T\",\"R\",\"Y\",\"M\",\"K\",\"W\", \"S\",\"N\")

and I want to replace a

Answer 1

Create a map

map = setNames(to, from)

and go from A to B

dd[] = map[dd]

The map serves as a look-up, associating 'from' names with 'to' values. The assignment preserves matrix dimensions and dimnames.