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 × 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 theComputers, office equip, software, data industry. It had profit of $ 16.183 million and tax of $ -0.122 million. its tax rate was -0.8%. ***

Let’s find the company in the computers, office equip, software,data industry with the highest profit

result <- corp_tax  %>% 
  filter(industry== "Computers, office equip, software, data") %>% 
  slice_max(profit, n=1)
result

# A tibble: 1 × 5
  company profit   tax tax_rate industry                              
  <chr>    <dbl> <dbl>    <dbl> <chr>                                 
1 Apple    24352  4125    0.169 Computers, office equip, software, da…

Apple is the company in computers, office equip, software, data industry. It had profit of $ 2.4352^{4} million and tax of $ 4125 million.Its tax rate was 16.9%.