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 NVR in the corp_tax tibble.

result  <-  corp_tax  %>% 
  filter(company == 'Sanmina-SCI')

result

# A tibble: 1 x 5
  company     profit    tax tax_rate industry                         
  <chr>        <dbl>  <dbl>    <dbl> <chr>                            
1 Sanmina-SCI   16.2 -0.122 -0.00754 Computers, office equip, softwar~

Sanmina-SCI is in the Computers, office equip, software, data industry. It had a profit of $16.183 million and tax of $-0.122 million. It’s tax rate was -0.8 %.

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Let’s find the company in the Industrial machinery industry with the highest profit.

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

# A tibble: 1 x 5
  company                 profit   tax tax_rate industry            
  <chr>                    <dbl> <dbl>    <dbl> <chr>               
1 Honeywell International   2830   -71  -0.0251 Industrial machinery

Honeywell International is the company in the Industrial machinery industry. It had a profit of $2830 million and tax of $-71 million. It’s tax rate was -2.5 %.