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 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 $174.139million and tax of $53.419million. Its tax rate was 30.7%.

Let’s find the company in the Chemicals 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 Chemicals industry with the highest profit. It had profit of $ 1307.278 million and tax of $ 288.755 million. its tax rate was 22.1%.