Exercise 0

Author

Affiliations

John R Little

Duke University

Goals:

• Create a R Notebook
• Import a dataset using reader::read_csv()

ANSWER can be found in exercise_00_answers.Rmd file

Exercise: Data Structures & Vector Types

1. Load the tidyverse libary package

library(tidyverse)

2. Fill in the blanks. Using what you’ve seen in class, if data/brodheadCenter.csv is a CSV (comma separated values) file, how would you load the file into a new object called brodhead?

_____  <- read_csv(________)

3. Display your new brodhead data frame?

4. starwars is an on-board dataset that comes with the tidyverse. Insert a new code chunk and display that data.

5. Copy and paste the following code into a new code chunk in your new file.

starwars %>% 
  ggplot(aes(fct_infreq(hair_color))) + 
  geom_bar() + 
  ggtitle("Hair Color Frequency of Star Wars Characters")

BONUS

6. Take a look at the structure of the brodhead object.

   • How many observations (rows) are there?
   • How many variables (columns) are there?
   • How many of the variables are numeric data?

   HINT: You can use the glimpse() function

ANSWER can be found in exercise_00_answers.Rmd file

Reuse

https://creativecommons.org/licenses/by/4.0/