Chapter 4 Posit Cloud: Cloud-Based R Development
Before installing R and RStudio on your local computer, you have an excellent option: Posit Cloud. This is a cloud-based version of RStudio that runs in your web browser, requiring no local installation!
What you’ll accomplish in this chapter:
- ✅ Understand the benefits of Posit Cloud
- ✅ Create a Posit Cloud account
- ✅ Access the Posit Cloud IDE
- ✅ Create your first Quarto document in the cloud
- ✅ Decide whether to use Posit Cloud or local RStudio (or both!)
4.1 Why Posit Cloud?
Posit Cloud offers several advantages:
| Advantage | Benefit |
|---|---|
| No Installation | Works on any computer with internet—nothing to install locally |
| Consistency | Guaranteed to have the latest R, RStudio, and Quarto versions |
| Automatic Updates | No need to update software yourself |
| Cloud Storage | Your projects are saved in the cloud and accessible from anywhere |
| Collaboration | Easy sharing of projects with classmates and instructors |
| Free Tier | 25 free compute hours per month (more than enough for this course) |
| Works Everywhere | Windows, macOS, Linux—if it has a browser, it works |
Best Use Case:
Posit Cloud is perfect for this course! You can start immediately without installation, and the free tier provides plenty of computing time for coursework.
4.2 Step 1: Create a Posit Cloud Account
4.2.1 1.1: Go to Posit Cloud
Navigate to:
What you’ll see:
The Posit Cloud homepage with options to sign up or log in.
4.2.2 1.2: Sign Up
Click “Sign Up” button.
Choose your sign-up method:
- GitHub account (recommended): Click “Sign up with GitHub” and authorize with your GitHub account (you created this in Chapter 2)
- Google account: Click “Sign up with Google”
- Email: Click “Sign up with Email” and create a new account
Recommendation:
Use your GitHub account to sign up. This connects everything and makes it easy to push code to GitHub later!
4.3 Step 2: Access the Posit Cloud IDE
4.3.1 2.1: Log Into Your Workspace
After account creation, you’ll automatically enter your workspace dashboard.
What you’ll see:
- A list of projects (empty at first)
- An option to create a “New Project”
- A left sidebar with workspace settings
4.3.2 2.2: Create Your First Project
Click the “New Project” button → Select “New RStudio Project”
Posit Cloud will: 1. Create a new project environment 2. Launch RStudio in your browser 3. Take about 30 seconds to boot up
Wait for the “R is ready!” message before proceeding. This ensures RStudio is fully loaded.
4.4 Step 3: Create Your First Quarto Document
Once RStudio loads, you now have access to the same interface as local RStudio, but in your browser!
4.4.1 3.1: Create a New Quarto Document
In the RStudio menu:
File → New File → Quarto Document
A dialog will appear asking:
- Title: “My First Quarto Document”
- Author: Your name
- Format: Select “HTML”
- Click “Create”
4.4.2 3.2: Explore the Editor
You’ll see:
- Top: The YAML header (metadata for your document)
- Middle: Markdown text and code chunks
- Right panel: Preview of your document (if you click the eye icon)
Example content:
The template includes sample text, a code chunk, and a plot example. Don’t worry if it looks complex—we’ll explain all of this in Chapter 6 (Quarto Setup)!
4.4.3 3.3: Render Your First Document
Click the “Render” button (or press Ctrl+Shift+K / Cmd+Shift+K)
Posit Cloud will: 1. Process your Quarto document 2. Generate an HTML file 3. Display the rendered output in the Viewer pane
Congratulations!
You’ve just created and rendered your first Quarto document! This is exactly what you’ll do throughout the course.
4.4.4 3.4: Save Your Work
Your document is automatically saved to the cloud. You can:
- Download the file to your computer
- Share the project link with classmates or instructors
- Access it from any device with internet
Pro Tip:
Right-click on the project name (left sidebar) → “Share Project” to generate a shareable link for collaboration or submission.
4.5 Step 4: Explore the Posit Cloud Interface
4.5.1 4.1: Your Dashboard
Click “Workspace” (top-left) to return to your dashboard. You’ll see:
- Your newly created project listed
- CPU/RAM usage for the current month
- Storage information
- Option to create more projects
4.5.2 4.2: Project Settings
Click on your project name → “Settings” (gear icon):
- Environment: View installed R packages
- Access: Control who can view/edit your project
- Publishing: (Advanced feature—skip for now)
- Delete: Remove the project if needed
4.5.3 4.3: Console and Packages
In RStudio within Posit Cloud, you have the same panels as local RStudio:
- Console (bottom-left): Run R code interactively
- Files (bottom-right): Browse your project files
- Packages (bottom-right): View installed packages
- Help (bottom-right): Search R documentation
Try running a simple command in the Console:
4.6 Comparison: Posit Cloud vs. Local RStudio
| Feature | Posit Cloud | Local RStudio |
|---|---|---|
| Installation | None—web-based | Must install R and RStudio |
| Cost | Free tier (25 hrs/month) | Free (RStudio Desktop) |
| Speed | Depends on internet | Fast (local processing) |
| Offline Use | No—requires internet | Yes |
| Collaboration | Easy project sharing | Requires manual setup |
| Storage | Cloud (1GB free) | Your computer |
| Best For | Getting started, collaboration | Heavy computation, offline work |
Recommendation for This Course:
Start with Posit Cloud to begin coursework immediately. Once you’re comfortable, optionally install local RStudio (Chapter 5) for faster processing and offline work.
4.7 Step 5: Running R Code in Posit Cloud
4.7.2 5.2: Script Execution
Create a new R script:
File → New File → R Script
Type some R code:
# Create a simple dataset
flowers <- data.frame(
name = c("Rose", "Tulip", "Daisy"),
color = c("Red", "Yellow", "White")
)
print(flowers)To run the code: Select the lines → Press Ctrl+Enter (or Cmd+Enter on Mac)
Or click “Run” (top-right of the editor)
Console Output:
name color
1 Rose Red
2 Tulip Yellow
3 Daisy White4.8 Step 6: Tips and Tricks for Posit Cloud
4.8.1 Managing Your Monthly Hours
- Check usage: Go to Workspace → Billing & Usage
- 25 free hours/month: Plenty for typical coursework
- What counts: Only active RStudio sessions consume hours (idle sessions pause automatically)
Save your hours:
- Close RStudio when not in use
- Use efficient code (avoid long-running loops)
- Idle sessions pause after 30 minutes
4.8.2 Uploading Data Files
To upload a CSV or data file:
- Click the Files tab (bottom-right)
- Click “Upload” button
- Select your file from your computer
- The file will be available in your R session
4.9 Deciding: Posit Cloud or Local RStudio?
4.9.1 Use Posit Cloud If:
✅ You want to start immediately without installation ✅ You primarily work on campus or have good internet ✅ You like automatic updates and don’t want to manage software ✅ You want easy project sharing with classmates
4.9.2 Install Local RStudio If:
✅ You prefer offline work or unreliable internet ✅ You want to run computationally intensive analyses ✅ You plan to use R professionally after this course ✅ You like the speed of local processing
Best Practice:
You can use both! Many students use Posit Cloud for coursework and local RStudio for backup or advanced work. They’re completely compatible.
4.10 Troubleshooting
4.10.1 “Workspace is loading… please wait”
This happens on first project creation. Wait 1-2 minutes for the server to initialize. Refresh the page if it takes too long.
4.11 Summary Checklist
Before moving to the next chapter, make sure you have:
Excellent! 🎉
You now have a working R and Quarto environment in the cloud. You can start coursework immediately, even before installing RStudio locally!
Next: If you want to also have R and RStudio on your computer, continue to Chapter 5: Installing RStudio. Otherwise, skip to Chapter 6: Installing Quarto.