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 Sanmina-SCI in the corp_tax tibble.

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

result

# A tibble: 1 x 5
  company     profit    tax tax_rate industry                         
  <chr>        <dbl>  <dbl>    <dbl> <chr>                            
1 Sanmina-SCI   16.2 -0.122 -0.00754 Computers, office equip, softwar…

Sanmina-SCI is in the Computers, office equip, software, data industry. It had a profit of $16.183 million and tax of $ -0.122 million. Its tax rate was -0.8%.

---

Lets 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. It had a profit of $1307.278 million and tax of $ 288.755 million. Its tax rate was 22.1%.