Introduction to dplyr

Code and text for Quiz 3

Load the packages we need.

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

Read the data into R.

corp_tax <- read_excel(here("_posts/2021-02-18-introduction-to-dplyr/corp_tax.xlsx"))

Let’s look at NVR in the corp_tax tibble.

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

result

# A tibble: 1 x 5
  company profit   tax tax_rate industry                  
  <chr>    <dbl> <dbl>    <dbl> <chr>                     
1 NVR       923.  126.    0.137 Engineering & construction

NVR is in the Engineering & construction industry.

It had profit of $922.694 million and tax of $ 126.358 million.

Its tax rate was 13.7.

---

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 in the Facebookis the company in Internet Services & Retailing. It had profit of $8624 million and tax of $ 1747 million. Its tax rate was 20.3%.