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 Northern Trust in the corp_tax tibble.

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

result

# A tibble: 1 × 5
  company        profit   tax tax_rate industry 
  <chr>           <dbl> <dbl>    <dbl> <chr>    
1 Northern Trust   1076  133.    0.123 Financial

Northern Trust is in the Financial industry. It has a profit of $1076 million and tax of $132.8 million. Its tax rate was 12.3%.

---

Let’s find 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 × 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 of $7289 million and tax of $30 million. Its tax rate was 0.4%.