Introduction to dplr

Code and text for Quiz 3.

Load the packages 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 Masco in the corp_tax table

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

Masco is in the Metals & metal products industry. It had profit of $788.60535 million and tax of $126.76535 million. Its tax rate 16.1%.

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Let’s 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 the Chemicals industry with the highest profit of $1307.278 million and tax of $288.755 million. Its tax rate 22.1%.