[R]: using character as argument in a function

Question

I've just a simple question regarding to case, that I want to use a character as an argument of a self created function.

I have three time series sets. Lets say a_ts, b_ts and c_ts and I want to merge a or b with c, depending on the funcion Input.

foo <-function(type){
   total_series <- rbind(type_ts,c_ts)
   return(total_series)
}

with type as type="a", type="b".

Lets say I dont want to change the character names. How can I solve the Problem, that a isnt printed in quotes in the function.

I want rbind(a_ts,c_ts) or rbind (b_ts,c_ts) without the quotes around my character argument.

Thanks for helping.

Answer 1

If I understand you correctly, something like this is what you need:

foo <- function(obj1, type) {
  obj2 <- paste0(type, "_ts")
  total_series <- rbind(obj1, get(obj2, envir = .GlobalEnv))
  return(total_series)
}