Introduction to dplyr

Code and text for Quiz 3.

Load the packages that we need.

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

Read 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 profit of $219 million and tax of $-60 million. Its tax rate was -27.4%

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Let’s find the company in the Food & beverages & tobacco industry with the highest profit

result  <- corp_tax %>% 
  filter(industry == "Food & beverages & tobacco")  %>% 
  slice_max(profit, n=1)

result

# A tibble: 1 x 5
  company      profit   tax tax_rate industry                  
  <chr>         <dbl> <dbl>    <dbl> <chr>                     
1 Altria Group   8922  1911    0.214 Food & beverages & tobacco

Altria Group is the company in the Food & beverages & tobacco industry with the highest profit. It had a profit of $8922 million and tax of $1911 million. Its tax rate was 21.4%.