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Mistake in exercise

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OaCantona 2016-03-24 18:25:56 +01:00
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relational-data.Rmd
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@ -452,7 +452,7 @@ flights %>%
patterns?
1. What does `anti_join(flights, airports, by = c("dest" = "faa"))` tell you?
What does `anti_join(airports, flights, by = c("dest" = "faa"))` tell you?
What does `anti_join(airports, flights, by = c("faa" = "dest"))` tell you?
## Join problems