Assignment 5

library(nycflights13)
library(tidyverse)

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1. join + filter - Which airplanes fly LGA to XNA (1 POINT)

q1 <- flights %>%
  filter(origin == "LGA", dest == "XNA") %>%   
  left_join(planes, by = "tailnum")         

2. join - Add the airline name to the flights table (1 POINT)

q2 <- flights %>%
  left_join(airlines, by = "carrier")

3. join + select + distinct() - Which airports have no commercial flights (1 POINT)

q3 <- airports %>%
  select(faa) %>%
  rename(airport_code = faa) %>%
  anti_join(flights %>%
              distinct(origin) %>%
              rename(airport_code = origin), by = "airport_code")