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 AMAZON in the corp_tax tibble.

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

result

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

AMAZON is in theRetail & 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 Motor vehicles and parts industry with the highest profit

result<-corp_tax %>%
filter(industry == "Motor vehicles and parts") %>%
  slice_max(profit, n=1)
result

# A tibble: 1 × 5
  company        profit   tax tax_rate industry                
  <chr>           <dbl> <dbl>    <dbl> <chr>                   
1 General Motors   4320  -104  -0.0241 Motor vehicles and parts

General Motors is the company in Motor vehicles and parts industry. It had profit of $ 4320 million and tax of -104 million. Its tax rate was -2.4%