Simple lookup to insert values in an R data frame

Question

This is a seemingly simple R question, but I don\'t see an exact answer here. I have a data frame (alldata) that looks like this:

Case     zip     market
1              


        

Answer 1

Here's the dplyr way of doing it:

library(tidyverse)
alldata %>%
  select(-market) %>%
  left_join(zipcodes, by="zip")

which, on my machine, is roughly the same performance as lookup.