How do I map a vector of values to another vector with my own custom map in R [duplicate]

Answer 1

install.packages("hash")
library(hash)
h<-hash(1:3, c(.2,.4,.5))
myVector<-c(1,2,3,2,3,3,1)
sapply(myVector,function(x){return(h[[as.character(x)]])})