introduction to dplyr

Code and text for Quiz 3

Load the packages we need.

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

Read data into R.

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

Look at Westrock in 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 a 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 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 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%