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R-VsCode/r_vscode_quick_start.md
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R-VsCode/r_vscode_quick_start.md
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# Quick Start: Testing R in VSCode
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## Step 1: Install R Extensions
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1. Open VSCode
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2. Go to Extensions panel (Ctrl+Shift+X)
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3. Search for and install:
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- "R" by REditorSupport
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- "R Debugger" by RDebugger
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- "R LSP Client" by REditorSupport
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## Step 2: Create Your First R File
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1. Create a new file (Ctrl+N)
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2. Save it with `.R` extension (e.g., `test.R`)
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3. Type some basic R code:
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```r
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print("Hello R!")
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x <- 1:5
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mean(x)
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```
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## Step 3: Run R Code in VSCode
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### Method A: Using R Terminal
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1. Open Terminal in VSCode (Ctrl+` )
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2. Type `R` to start R interactive session
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3. Type commands directly:
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```r
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> 2 + 2
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[1] 4
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> plot(1:10)
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```
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### Method B: Run Entire Script
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1. Open your `.R` file
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2. Press Ctrl+Shift+P
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3. Type "R: Run Source" and press Enter
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4. Output appears in R Terminal
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### Method C: Run Selected Code
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1. Select code in your R file
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2. Right-click → "Run Selected Line(s)"
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3. Or use shortcut: Ctrl+Enter
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## Step 4: View Plots
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1. Run plot commands in R terminal:
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```r
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plot(1:10, main="Test Plot")
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```
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2. Plots appear in VSCode's Plot viewer panel
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## Step 5: Use R Markdown (Optional)
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1. Create new file with `.Rmd` extension
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2. Add code chunks:
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```r
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```{r}
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summary(mtcars)
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```
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```
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3. Click "Knit" button to render document
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## Step 6: Debug R Code
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1. Set breakpoint by clicking left margin
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2. Press F5 to start debugging
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3. Step through code with F10/F11
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## Quick Test Commands to Try
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In R terminal, test these:
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```r
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# Basic math
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2 + 2
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sqrt(16)
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# Create data
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data <- c(1, 3, 5, 7, 9)
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mean(data)
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# Simple plot
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plot(data, type="l", col="blue")
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# Check packages
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installed.packages()[1:5,]
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```
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## What You Should See
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- ✅ Code completion as you type
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- ✅ Syntax highlighting
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- ✅ R terminal with `>` prompt
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- ✅ Plots in separate viewer
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- ✅ Variable values in debugger
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## Troubleshooting
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- If R isn't found: Check R path in extension settings
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- Restart VSCode after installing extensions
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- Ensure R is in system PATH
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