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"))

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%

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

result <- corp_tax %>% 
  filter(industry == 'Utilities, gas and electric') %>% 
slice_max(profit, n=1)
result

# A tibble: 1 x 5
  company        profit   tax tax_rate industry                   
  <chr>           <dbl> <dbl>    <dbl> <chr>                      
1 NextEra Energy   7289    30  0.00412 Utilities, gas and electric

NextEra Energy is the company in Utilities, gas and electric industry with the highest profit. It had profit of $7289 million and tax of $ 30 million. Its tax rate was 0.4%

---

Let’s fine the company in the Internet Services & Retailing 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 IInternet Services & Retailing industry with the highest profit. It had profit of $8624 million and tax of $ 1747 million. Its tax rate was 20.3%

---

Let’s fine the company in the Occidental Petroleum industry with the highest profit

result <- corp_tax %>% 
  filter(industry == 'Oil, gas & pipelines') %>% 
slice_max(profit, n=1)
result

# A tibble: 1 x 5
  company  profit   tax tax_rate industry            
  <chr>     <dbl> <dbl>    <dbl> <chr>               
1 Phillips   5461   739    0.135 Oil, gas & pipelines

Phillipsis the company in Oil, gas & pipelines industry with the highest profit. It had profit of $5461 million and tax of $ 739 million. Its tax rate was 13.5%