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 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 Health care industry with the highest profit.

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

# A tibble: 1 x 5
  company profit   tax tax_rate industry   
  <chr>    <dbl> <dbl>    <dbl> <chr>      
1 Anthem    4990  1128    0.226 Health care

Anthem is the company in the Health care industry with the highest profit. It had profit of $4990 million and tax of $1128 million. Its tax rate was 22.6%.