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Update relational-data.Rmd 

Hi Hadwick. Thanks for putting this book together. I don't believe these a data frame called carrier and the example here is joining flights2 and airlines by the key carrier.
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sibusiso16 2016-06-05 11:15:12 +02:00
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@ -154,7 +154,7 @@ Like `mutate()`, the join functions add variables to the right, so if you have a
(When you're in RStudio, you can use `View()` to avoid this problem). (When you're in RStudio, you can use `View()` to avoid this problem).
For example, imagine you want to add the full airline name to the `flights` data. You can combine the `airlines` and `carrier` data frames with `left_join()`: For example, imagine you want to add the full airline name to the `flights2` data. You can combine the `airlines` and `flights2` data frames with `left_join()`:
```{r} ```{r}
flights2 %>% flights2 %>%