Introduction to dplyr

Code and text for Quiz 3

Load the packages we need.

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

Read data into R.

corp_tax<- read_excel(here("corp_tax.xlsx"))

Let’s look at NVR in the corp_tax tibble.

result<- corp_tax %>% 
  filter(company == 'DISH Network')

result

# A tibble: 1 x 5
  company      profit   tax tax_rate industry          
  <chr>         <dbl> <dbl>    <dbl> <chr>             
1 DISH Network  2145.  44.5   0.0207 Telecommunications

NVR is in the Telecommunications industry. It has profit of $ 2145.257 million and tax of $44.451 million. It’s tax rate was 2.1 %.

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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 == "Chemicals") %>% 
  slice_max(profit, n=1)

result

# A tibble: 1 x 5
  company          profit   tax tax_rate industry 
  <chr>             <dbl> <dbl>    <dbl> <chr>    
1 Sherwin-Williams  1307.  289.    0.221 Chemicals

Sherwin-Williams is the company in the Utilities, gas and electric industry with the highest profit. It had profit of $1307.278 million and tax of $288.755 million. It’s tax rate was 22.1 %.