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 Westrock in the corp_tax tibble.

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

result

# A tibble: 1 × 5
  company  profit   tax tax_rate industry                   
  <chr>     <dbl> <dbl>    <dbl> <chr>                      
1 Westrock   710. -4.10 -0.00578 Miscellaneous manufacturing

Westrock is in the Miscellaneous manufacturing industry. It had profit of $ 709.9 million and tax of $ -4.1 million. Its tax rate was -0.6%.

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Let’s find the company in the Utilities, gas and electric industry with the highest profit

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

# A tibble: 1 × 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%.