using apply with assign in R

问题

Consider the following example:

Vars <- c("car","bike","lorry")
Dat <- c(10,20,22)

for (i in 1:length(Vars)){
  assign(Vars[i],Dat[i])
}

Here, I would like to generate three variables in the workspace named according to the entries in Vars and the values in Dat. At the moment I am using a loop, but I have been trying to remove the loop by using apply, how would be the best way of doing this?

回答1:

This is a great example of when to use a for loop instead of an apply.
The best solution is to leave it as it is.

if you really want to use an *ply loop, use mapply

 mapply(assign, Vars, Dat, MoreArgs=list(envir=parent.frame()))

回答2:

You can also use attach for example:

attach(as.list(setNames(Dat,Vars)))

来源：https://stackoverflow.com/questions/16276667/using-apply-with-assign-in-r