Assignment-5

library(nycflights13)
library(tidyverse)

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1. Which airplanes fly LGA to XNA

q1 <- flights %>%
  filter(origin == "LGA", dest == "XNA") %>%
  select(flight, tailnum)

2. Add the airline name to the flights table

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

3. Which airports have no commercial flights

airports_with_flights2 <- flights %>%
  select(origin) %>%
  distinct()

all_airports <- airports %>%
  select(faa) %>%
  distinct()


airports_no_flights <- all_airports %>%
  anti_join(airports_with_flights2, by = c("faa" = "origin"))