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 Occidental Petroleum in the corp_tax tibble.

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

# A tibble: 1 × 5
  company              profit   tax tax_rate industry            
  <chr>                 <dbl> <dbl>    <dbl> <chr>               
1 Occidental Petroleum   3379   -23 -0.00681 Oil, gas & pipelines

Occidental Petroleum is in the Oil, gas & pipelines industry. It had a profit of $ 3379 million and tax of $ -23 million. Its tax rate was -0.7%.

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Lets find the company in the Health care industry

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. It had a profit of $ 4990 million and tax of $ 1128 million. Its tax rate was 22.6%.