introduction to dplyr

Code amd 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 Amazon.com in the corp_tax tibble

result <- corp_tax %>% 
  filter(company == "Amazon.com")

result

# A tibble: 1 x 5
  company    profit   tax tax_rate industry                
  <chr>       <dbl> <dbl>    <dbl> <chr>                   
1 Amazon.com  10835  -129  -0.0119 Retail & wholesale trade

Amazon.com is in the Retail & wholesale trade industry. It had profit of $ 1.0835^{4} million and tax of $ -129 million. Its tax rate was -1.2

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Let’s find the company in the Internet Services & retailing industry with the highest profit

result <- corp_tax %>%
  filter(industry == "Internet Services & Retailing") %>%
  slice_max(profit, n=1)
result

# A tibble: 1 x 5
  company  profit   tax tax_rate industry                     
  <chr>     <dbl> <dbl>    <dbl> <chr>                        
1 Facebook   8624  1747    0.203 Internet Services & Retailing

Facebook is the company in Internet Services & Retailing industry with the highest profit. It had profit of $ 8624 million and tax of $ 1747 million. Its tax rate was 20.3