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 x 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 == 'Internet Services & Retailing') %>% 
  slice_max(profit, n=1)

result

# A tibble: 1 x 5
  company  profit   tax tax_rate industry                     
  <chr>     <dbl> <dbl>    <dbl> <chr>                        
1 Facebook   8624  1747    0.203 Internet Services & Retailing

Facebook is the company in Internet Services and Retailing industry with the most profit. It had profit of $8624 million and tax of $1747 million. Its tax rate was 20.3%