introduction to dplyr

Code and text for Quiz 3

load packages

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

read the data into R

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

Look at Masco in the corp_tax tibble

corp_tax %>% 
  filter(company == "Masco")

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

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

result

# A tibble: 1 x 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 products industry.It has a profit of $788.60535 million and tax of $126.76535 million. Its tax rate was 16.1%

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Lets find the company in the Utilities, gas and electric industry with the highest profit

result  <- corp_tax %>% 
  filter(industry == "Ultilities, gas and electric") %>% 
  slice_max(profit, n=1)
result

# A tibble: 0 x 5
# ... with 5 variables: company <chr>, profit <dbl>, tax <dbl>,
#   tax_rate <dbl>, industry <chr>