introduction to dplyr

Code and text for Quiz 3.

library(tidyverse)
library(readxl)
library(here)

Read the data into R.

corp_tax<- read_excel(here("corp_tax.xlsx"))

Let’s look at Masco in the corp_tax tibble.

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

# A tibble: 1 × 5
  company profit   tax tax_rate industry               
  <chr>    <dbl> <dbl>    <dbl> <chr>                  
1 Masco     789.  127.    0.161 Metals & metal products

Masco is in the Metals & metal productsindustry. It had a profit of $788.60535 millions and a tax of $126.76535 millions. Its tax rate 16.1%.

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Let’s find the company in the Health care industry with thee highest profit

result <- corp_tax %>% 
  filter(industry == "Health care") %>% 
  slice_max(profit, n=1)
result

# A tibble: 1 × 5
  company profit   tax tax_rate industry   
  <chr>    <dbl> <dbl>    <dbl> <chr>      
1 Anthem    4990  1128    0.226 Health care

Anthem is the company in Health care industry with the highest profit. It had a profit of $4990 millions and a tax of $1128 millions. Its tax rate 22.6%.