RStudio IDE setup in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to install the RStudio IDE package.

R Programming

install.packages([1])

Drag options to blanks, or click blank then click option'

A"RStudio"

B"studio"

C"rstudio"

D"rstudioapi"

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect capitalization in the package name.

Trying to install a package that does not exist.

The correct package name to install RStudio IDE related tools is "rstudioapi".

2fill in blank

medium

Complete the code to load the RStudio API library after installation.

R Programming

library([1])

Drag options to blanks, or click blank then click option'

Astudioapi

Brstudioapi

Crstudio

DRStudio

Attempts:

3 left

💡 Hint

Common Mistakes

Loading a non-existent library like 'studioapi'.

Using incorrect capitalization.

The correct library to load for RStudio API functions is rstudioapi.

3fill in blank

hard

Fix the error in the code to open a new RStudio project.

R Programming

rstudioapi::[1]("path/to/project")

Drag options to blanks, or click blank then click option'

AOpenProject

Bopenproject

CopenProject

Dopen_proj

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect capitalization in the function name.

Using a non-existent function name.

The correct function to open a project is openProject with exact capitalization.

4fill in blank

hard

Fill both blanks to create a new RStudio project in a specified directory without opening it.

R Programming

rstudioapi::[1](path = "path/to/new_project", open = [2])

Drag options to blanks, or click blank then click option'

AcreateProject

BopenProject

CFALSE

DTRUE

Attempts:

3 left

💡 Hint

Common Mistakes

Using openProject instead of createProject.

Setting open to TRUE when you want to avoid opening.

Use createProject to create a new project and set open = FALSE to not open it immediately.

5fill in blank

hard

Fill all three blanks to check if RStudio is running and get the version.

R Programming

if (rstudioapi::[1]()) {
  version <- rstudioapi::[2]()
  print(version$[3])
}

Drag options to blanks, or click blank then click option'

AisAvailable

BversionInfo

Cversion

DisRunning

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent function like isRunning.

Accessing a wrong element of the version object.

isAvailable() checks if RStudio is running, versionInfo() gets version details, and version accesses the version string.

Practice

1. What is the first step to start using RStudio IDE on your computer?

easy

A. Install R software before installing RStudio

B. Install RStudio directly without R

C. Open RStudio without installation

D. Install any text editor like Notepad

Solution

1. Step 1: Understand software dependencies

   RStudio requires R software to run R code, so R must be installed first.

2. Step 2: Confirm installation order

   Installing R first ensures RStudio can find and use R properly.

3. Final Answer:

   Install R software before installing RStudio -> Option A

4. Quick Check:

   Install R first = Install R software before installing RStudio [OK]

Hint: Always install R before RStudio to avoid errors [OK]

Common Mistakes:

• Trying to run RStudio without R installed
• Installing RStudio before R
• Confusing RStudio with R software
• Skipping installation steps

2. Which of the following is the correct way to run a script in RStudio?

easy

A. Write code in the console and press Enter

B. Write code in the script editor and click 'Run' button

C. Write code in a text file and save as .txt

D. Write code in a spreadsheet and import

Solution

1. Step 1: Identify script usage in RStudio

   Scripts are written in the script editor pane, not directly in the console.

2. Step 2: Understand how to execute scripts

   Clicking the 'Run' button sends code from the script editor to the console for execution.

3. Final Answer:

   Write code in the script editor and click 'Run' button -> Option B

4. Quick Check:

   Run scripts via editor 'Run' button = Write code in the script editor and click 'Run' button [OK]

Hint: Use the 'Run' button in script editor to execute code [OK]

Common Mistakes:

• Typing code only in console for scripts
• Saving scripts as .txt instead of .R
• Trying to run code from spreadsheet
• Not using the 'Run' button

3. What will be the output in RStudio console after running this script?

print(2 + 3 * 4)

medium

A. 20

B. Error

C. 24

D. 14

Solution

1. Step 1: Apply operator precedence in R

   Multiplication (*) has higher priority than addition (+), so 3 * 4 = 12 is calculated first.

2. Step 2: Calculate the expression

   Then add 2 + 12 = 14, so print outputs 14.

3. Final Answer:

   14 -> Option D

4. Quick Check:

   2 + (3 * 4) = 14 [OK]

Hint: Remember * before + in math expressions [OK]

Common Mistakes:

• Adding before multiplying (2+3)*4 = 20
• Expecting error from simple math
• Confusing output with string
• Ignoring operator precedence

4. You wrote this code in RStudio script but get an error:

prin("Hello World")

What is the error and how to fix it?

medium

A. Function name typo; change 'prin' to 'print'

B. Missing parentheses; add () after 'prin'

C. Wrong quotes; use single quotes instead

D. No error; code runs fine

Solution

1. Step 1: Identify the function name

   The function to display output is 'print', but code uses 'prin' which is undefined.

2. Step 2: Correct the function name

   Changing 'prin' to 'print' fixes the error and allows code to run.

3. Final Answer:

   Function name typo; change 'prin' to 'print' -> Option A

4. Quick Check:

   Typo in function name = Function name typo; change 'prin' to 'print' [OK]

Hint: Check spelling of function names carefully [OK]

Common Mistakes:

• Assuming missing parentheses cause error
• Changing quotes unnecessarily
• Ignoring error messages
• Thinking code runs fine despite typo

5. You want to save your R script in RStudio so you can run it later. Which file extension should you use to save your script?

hard

A. .txt

B. .r

C. .R

D. .docx

Solution

1. Step 1: Understand R script file extensions

   R scripts are saved with '.R' extension (uppercase) to be recognized by RStudio and R.

2. Step 2: Differentiate from other file types

   Extensions like '.txt' or '.docx' are not recognized as R scripts and won't run properly.

3. Final Answer:

   .R -> Option C

4. Quick Check:

   Save scripts as .R files = .R [OK]

Hint: Use .R extension to save R scripts for easy loading [OK]

Common Mistakes:

• Saving scripts as .txt files
• Using lowercase .r which may cause issues
• Saving as Word documents (.docx)
• Not saving scripts at all