Podcast
Questions and Answers
What is the primary purpose of RStudio?
What is the primary purpose of RStudio?
- To replace the R programming language.
- To serve as a software development platform.
- To function as a web browser.
- To act as an Integrated Development Environment (IDE) for R. (correct)
Which of the following is a key characteristic of R?
Which of the following is a key characteristic of R?
- It is specifically designed for gaming development.
- It requires payment for use.
- It is tailored for data analysis and visualization. (correct)
- It primarily supports web development.
In the RStudio interface, where would you typically enter commands to be executed?
In the RStudio interface, where would you typically enter commands to be executed?
- The Files pane
- The History pane
- The Console pane (correct)
- The Source pane
If you want to save and record multiple lines of R code, which type of file should you use in RStudio?
If you want to save and record multiple lines of R code, which type of file should you use in RStudio?
Which pane in RStudio displays the list of variables and data objects you have created during your current session?
Which pane in RStudio displays the list of variables and data objects you have created during your current session?
What is the purpose of the 'Files' pane in RStudio?
What is the purpose of the 'Files' pane in RStudio?
In R, what are 'packages'?
In R, what are 'packages'?
Which function would you use in R to calculate the square root of a number?
Which function would you use in R to calculate the square root of a number?
How can you add comments to your R code?
How can you add comments to your R code?
What is an RStudio project primarily used for?
What is an RStudio project primarily used for?
In R, what function is used to calculate the absolute value of a number?
In R, what function is used to calculate the absolute value of a number?
Which of the following best describes the role of the CRAN repository in R?
Which of the following best describes the role of the CRAN repository in R?
What is the command to calculate $e^2$ in R (where 'e' is Euler's number)?
What is the command to calculate $e^2$ in R (where 'e' is Euler's number)?
After installing a package, what must you do before you can use its functions in your current R session?
After installing a package, what must you do before you can use its functions in your current R session?
When using RStudio, which action will clear the console?
When using RStudio, which action will clear the console?
Which type of file is commonly used for importing data into R, especially when the data is in a comma-separated format?
Which type of file is commonly used for importing data into R, especially when the data is in a comma-separated format?
If you see '[1] 10' in the console after running sqrt(100), what does '[1]' indicate?
If you see '[1] 10' in the console after running sqrt(100), what does '[1]' indicate?
You are working on an R script and want to execute a single line of code. In RStudio, what is the quickest way to do this?
You are working on an R script and want to execute a single line of code. In RStudio, what is the quickest way to do this?
Where can you find the history of commands that you've previously used in RStudio?
Where can you find the history of commands that you've previously used in RStudio?
When setting up a new project in RStudio, what benefit does using a working directory provide?
When setting up a new project in RStudio, what benefit does using a working directory provide?
Which of the following companies uses the R programming language?
Which of the following companies uses the R programming language?
If the time limit for Quiz 2 is 5 minutes, what might be a valid reason for a student to have more than 5 minutes allotted for them?
If the time limit for Quiz 2 is 5 minutes, what might be a valid reason for a student to have more than 5 minutes allotted for them?
If a student is taking Quiz 2 outside of the classroom, what will happen?
If a student is taking Quiz 2 outside of the classroom, what will happen?
When can student expect to see their grades?
When can student expect to see their grades?
Can students use open books and notes for Quiz 2?
Can students use open books and notes for Quiz 2?
When is Quiz 2 available on the course site?
When is Quiz 2 available on the course site?
What should you do if you see a mistake in your graded Quiz 2?
What should you do if you see a mistake in your graded Quiz 2?
Which of these programming activities is suggested as a good way to learn-by-doing?
Which of these programming activities is suggested as a good way to learn-by-doing?
I can expect grades for a specific quiz?
I can expect grades for a specific quiz?
Flashcards
What is R?
What is R?
A software development platform and programming language often used as the base for other tools.
What is RStudio?
What is RStudio?
An Integrated Development Environment (IDE) for R, providing a nicer interface that makes R easier to use and requires R to run.
Why use R?
Why use R?
A programming language designed specifically for data analysis and visualization, open source and easier to learn, with many add-ons.
What is the Source Pane?
What is the Source Pane?
Signup and view all the flashcards
What is the Console Pane?
What is the Console Pane?
Signup and view all the flashcards
What is the Environment Pane?
What is the Environment Pane?
Signup and view all the flashcards
What is the History tab?
What is the History tab?
Signup and view all the flashcards
What is the working directory?
What is the working directory?
Signup and view all the flashcards
What are R Packages?
What are R Packages?
Signup and view all the flashcards
What are Functions?
What are Functions?
Signup and view all the flashcards
What are Comments?
What are Comments?
Signup and view all the flashcards
What is an RStudio Project?
What is an RStudio Project?
Signup and view all the flashcards
Study Notes
- Quiz 2 will be available on the course site for the first 10 minutes of class
- Quiz 2 has a 5-minute time limit with accommodations for disabilities.
- Open-source, free software
- Books, notes, and digital resources are permitted during Quiz 2; searching and collaboration are prohibited.
- Sharing passwords is not allowed; roll calls will be taken and quiz grades taken outside the classroom will be disqualified.
- Grades and results are available around Thursday each week.
- The Week 2 main topics include R and RStudio for BUAN44 Business Analytics I presented by Haoyan Sun, Ph.D.
- The agenda includes understanding the purpose and characteristics of the R language, the RStudio user interface, packages, projects, file management, basic numeric operations, and functions, followed by an in-class exercise.
Software for Business Analytics
- R serves as a software development platform and a programming language described as "The base/engine."
- RStudio is an Integrated Development Environment (IDE) with a nicer, easier-to-use interface that requires R to run, and is referred to as "The pretty face".
Why R and RStudio are Used in Business Analytics
- R and RStudio are open source and free
- R and RStudio are designed for data analysis and visualization
- R is easier to learn for those new to programming
- R and RStudio have many add-ons or 'packages' for various data analysis tasks
- R and RStudio is a highly sought skill by firms using analytics and data science
Projects Using R
- T-Mobile classifies customer service texts to properly direct customers to agents.
- Twitter performs text analyses on tweets.
- The Financial Times creates data visualizations in its articles.
Tips on Learning How to Program
- Learn by doing, diving head first into problem-solving, and constantly interact with code during the learning phase.
- Take time to figure things out independently before asking for help; there is a high likelihood that the answer is readily available.
- Utilize online resources, and prioritize understanding the fundamentals for long-term benefits.
RStudio User Interface
- The RStudio interface is composed of several components that include the Menu Bar, Source, Console, Environment/History/Connections, Files/Plots/Packages/Help/Viewer.
- RStudio, also has an Environment section which displays the info of your data, History of previous commands and Connections to database connections
- RStudio includes various tabs such as a Files tab for file exploration, Plots for output location for plots, a Packages tab that provides a list of installed packages, along with Help and Viewer tabs for advanced local web content.
- The Menu Bar is located at the top of the RStudio window
- The 'file' menu offers access to various file types that are supported by RStudio.
- The Console is the area where commands are entered, and output is displayed
- The Source pane serves as an additional window where you are able to view R scripts and allows data viewing when open.
- The Environment tab lists the objects created with R commands (such as data and values).
- The History tab documents R commands that have been previously used.
- The Files tab shows a default working directory (where RStudio will look first for scripts and files).
- The default directory for windows os machines is the “Documents” folder
- Packages are collections of R functions, data, and compiled code, and R comes with a standard set of packages.
- Additional packages are available for download and installation.
- Once installed a package must be loaded into the current R sessions to be used
File Management with RStudio Projects
- An RStudio project (identified by its .Rproj file extension) is linked to a specific R working directory, acting like a folder containing R scripts and other necessary files, as well as the workspace, history, and scripts for the project.
- In addition, R code that interacts with external files will do so based on this working directory.
- Opening an RStudio project will prompt the Files tab to show the directory of the opened project and this then becomes your "working directory"
Basic Calulations
- R functions such as sqrt(), log(), abs(), and exp() accepts parameters within parentheses and then immediately returning a value.
Comments
- Comments are non-executable and are started with the # symbol
Class Excercise
- Complete the Exercise Worksheet on the course site before leaving.
- Full credit can be obtained even if incomplete, by completing reflection questions.
- The Class Exercise is a critical part of the course
- Quiz 3 includes review of today’s slides/exercises.
- Supplementary Reading (optional, but recommended): Ch.1 of our textbook
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
