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 Synnex in the corp_tax tibble.

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

result

# A tibble: 1 x 5
  company profit   tax tax_rate industry                
  <chr>    <dbl> <dbl>    <dbl> <chr>                   
1 Synnex    174.  53.4    0.307 Retail & wholesale trade

Synnex is in the Retail & wholesale trade industry. It had profit of $174.139 million and tax of $53.419 million. Its tax rate was 30.7%.

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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 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 the 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%.