library(tidyverse)
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library(nycflights13)

Create the code makes a table for each of the below questions.

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

flights_lga_xna <- flights %>%
  filter(origin == "LGA" & dest == "XNA") %>%
  select(tailnum) %>%
  distinct()
print(head(flights_lga_xna))
## # A tibble: 6 × 1
##   tailnum
##   <chr>  
## 1 N722MQ 
## 2 N719MQ 
## 3 N739MQ 
## 4 N711MQ 
## 5 N723MQ 
## 6 N730MQ

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

flights_with_airline <- flights %>%
  left_join(airlines, by = "carrier") %>%
  select(flight, name)
print(head(flights_with_airline))
## # A tibble: 6 × 2
##   flight name                  
##    <int> <chr>                 
## 1   1545 United Air Lines Inc. 
## 2   1714 United Air Lines Inc. 
## 3   1141 American Airlines Inc.
## 4    725 JetBlue Airways       
## 5    461 Delta Air Lines Inc.  
## 6   1696 United Air Lines Inc.

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

airports_no_flights <- airports %>%
  anti_join(flights, by = c("faa" = "dest")) %>%
  select(name) %>%
  distinct()
print(head(airports_no_flights))
## # A tibble: 6 × 1
##   name                          
##   <chr>                         
## 1 Lansdowne Airport             
## 2 Moton Field Municipal Airport 
## 3 Schaumburg Regional           
## 4 Randall Airport               
## 5 Jekyll Island Airport         
## 6 Elizabethton Municipal Airport

4. EXTRA CREDIT - (2 POINT2) - NO HELP - NO PARTIAL CREDIT

Create a table with the names of the airports with the most

winds (wind_speed > 30). The table must contain only the airport

name (airports$name) and no duplicate rows

airports_high_wind <- weather %>%
  filter(wind_speed > 30) %>%
  select(origin) %>%
  distinct() %>%
  left_join(airports, by = c("origin" = "faa")) %>%
  select(name) %>%
  distinct()
print(head(airports_high_wind))
## # A tibble: 3 × 1
##   name               
##   <chr>              
## 1 Newark Liberty Intl
## 2 John F Kennedy Intl
## 3 La Guardia