Introduction to dplyr

Code and text for Quiz 3

Load the packages that we need

library(tidyverse)
library(readxl)
library(here)

Read the data into R.

corp_tax <- read_excel(here("corp_tax.xlsx"))

Let’s Look at JetBlue Airways in the corp_tax tibble.

result <- corp_tax %>% 
  filter(company == "JetBlue Airways")

result

# A tibble: 1 x 5
  company         profit   tax tax_rate industry      
  <chr>            <dbl> <dbl>    <dbl> <chr>         
1 JetBlue Airways    219   -60   -0.274 Transportation

JetBlue Airways is in the Transportation industry. It had a profit of $ result %>% select(profit) million and tax of $ -60million. Its tax rate was -27.4%

Let’s find the company in the Transportation industry with the highest profit

result <- corp_tax %>% 
  filter(industry == 'Transportation') %>% 
  slice_max(profit, n=1)
result

# A tibble: 1 x 5
  company       profit   tax tax_rate industry      
  <chr>          <dbl> <dbl>    <dbl> <chr>         
1 Union Pacific   7454  1144    0.153 Transportation

Union Pacific is the company in the Transportation industry. It had a profit of $result %>% select(profit) million and tax of $1144million. Its tax rate was 15.3%.