FES 720 Introduction to R

LAB: Vectors

This is the lab associated with the lecture and lesson on Workspace and Files in R.

Please upload your final completed lab on the Assignments page in Canvas, as per the instructions below.

You are welcome and expected to ask for help from the instructors if you get stuck: Please also come to the R Bootcamp on Friday—there is coffee and snacks!

Harry Potter Movies

In this lab, we will continue to work with data from the Harry Potter series of moving pictures.

Table 1. Box office history for all Harry Potter movies.

Release Date Movie Production Budget Domestic Opening Weekend Domestic Box Office Worldwide Box Office
Nov 16, 2001 Harry Potter and the Sorcerer’s Stone $125,000,000 $90,294,621 $317,575,550 $974,755,371
Nov 15, 2002 Harry Potter and the Chamber of Secrets $100,000,000 $88,357,488 $261,987,880 $878,979,634
Jun 4, 2004 Harry Potter and the Prisoner of Azkaban $130,000,000 $93,687,367 $249,538,952 $796,688,549
Nov 18, 2005 Harry Potter and the Goblet of Fire $150,000,000 $102,685,961 $290,013,036 $896,911,078
Jul 11, 2007 Harry Potter and the Order of the Phoenix $150,000,000 $77,108,414 $292,004,738 $942,943,935
Jul 15, 2009 Harry Potter and the Half-Blood Prince $250,000,000 $77,835,727 $301,959,197 $935,083,686
Nov 19, 2010 Harry Potter and the Deathly Hallows: Part I $125,000,000 $125,017,372 $295,983,305 $960,283,305
Jul 15, 2011 Harry Potter and the Deathly Hallows: Part II $125,000,000 $169,189,427 $381,011,219 $1,341,511,219
Nov 18, 2016 Fantastic Beasts and Where to Find Them $180,000,000 $74,403,387 $234,037,575 $803,798,342

Source: http://www.the-numbers.com/movies/franchise/Harry-Potter#tab=summary


Refer back to your answers for Basic Building Blocks lab. You may use the numeric vectors you coded there.

  1. Which movie/s had a Production Budget of more than $150,000,000? Generate a vector of logical statements.

  2. Which movie/s had a Worldwide Box Office of less than $900,000,000? Generate a vector of logical statements.

  3. Which movies return on investment (i.e., worldwide box office - production budget) was over $500,000,000?

  4. Create a named vector of all the Movie names called movie_names.

Is there a way we could create this vector programatically. (Well, yes, otherwise I wouldn’t ask the question …).

Look at the names of the movies. What string is common to almost all of them?

  1. Thus, one approach is to create an object containing the text string “Harry Potter and the”. Call this string hpat.

  2. Create a vector with the specific title section for each movie 1–8 (e.g., “Sorcerer’s Stone” for movie 1), called hp_titles.

  3. Combine the vectors hpat and hp_titles to create a vector of 8 elements for the full titles of the first 8 movies. Call this vector hp_movies

  4. Add a 9th element to this vector for the title of the 9th movie.

How to write up your answers

Please check the help page for a reminder, if you need to.

Updated: 2017-09-17