---
title: "Live Code Execution with typeRun"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Live Code Execution with typeRun}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  eval = FALSE  # Don't actually run typeRun in vignette
)
```

```{r setup}
library(typeR)
```

## Introduction

`typeRun()` is an enhanced version of `typeR()` that not only simulates typing animation but also **executes your R code in real-time**. This makes it perfect for:

- 🎓 Live teaching and workshops
- 🎤 Conference presentations
- 📹 Recording tutorials
- 🧪 Interactive demonstrations

## Basic Usage

### Simple Script Execution

The most basic usage is to run an R script with typing animation and live execution:

```{r basic}
# Create a simple script
cat("# Data Analysis Demo
x <- 1:10
mean(x)
sum(x)
", file = "demo.R")

# Type and execute it
typeRun("demo.R")
```

**What you'll see:**
- Code types out character by character
- Each line executes as it's typed
- Results appear immediately after each command

### Comparison: typeR vs typeRun

```{r comparison}
# typeR: Just displays, doesn't execute
typeR("demo.R")
# Output: Shows the code typing out (no results)

# typeRun: Types AND executes
typeRun("demo.R")
# Output: Shows code typing + execution results
```


## Customizing the Experience

### Control Typing Speed

```{r speed}
# Slower typing for dramatic effect
typeRun("demo.R", delay = 0.1, jitter = 0.02)

# Faster typing for quick demos
typeRun("demo.R", delay = 0.02, jitter = 0.005)
```

**Parameters:**
- `delay`: Base time between characters (seconds)
- `jitter`: Random variation for natural feel

### Limit Output Length

For long outputs, control how much is displayed:

```{r output-control}
cat("
# Long vector
long_vec <- 1:1000
long_vec

# Large data frame
big_df <- mtcars[rep(1:32, 10), ]
big_df
", file = "long_output.R")

# Show only first 5 elements/rows
typeRun("long_output.R", max_print = 5)
```


## Working with Models

### Linear Models

```{r lm}
cat("
# Linear regression
model <- lm(mpg ~ hp + wt, data = mtcars)
summary(model)
", file = "model_demo.R")

typeRun("model_demo.R")
```

**What happens:**
- `model <- lm(...)` executes silently (no output)
- `summary(model)` displays the full summary with coefficients, R-squared, etc.

### GLM and Other Models

`typeRun()` handles all model types intelligently:

```{r models}
cat("
# Logistic regression
glm_model <- glm(am ~ hp + wt, data = mtcars, family = binomial)
summary(glm_model)

# Poisson regression
pois_model <- glm(carb ~ mpg, data = mtcars, family = poisson)
summary(pois_model)
", file = "glm_demo.R")

typeRun("glm_demo.R")
```


## Interactive Control

### Pause and Resume

During execution, you have full control:

1. **Press ESC** (or Ctrl+C) to pause
2. You'll see: `Enter choice (1 resume or 2 stop):`
3. **Enter 1** to continue from where you paused
4. **Enter 2** to stop completely

```{r interactive, eval=FALSE}
typeRun("long_script.R")
# Press ESC while running
# Enter 1 to resume
# Or enter 2 to stop
```

This is perfect for:
- Answering questions during presentations
- Explaining specific code sections
- Debugging during demonstrations



## Working with R Markdown and Quarto

### R Markdown Files

`typeRun()` intelligently handles `.Rmd` files:

```{r}
# Create an R Markdown example
typeRun("report.Rmd")
```

**Behavior:**
- ✅ Types and shows all text
- ✅ Executes only R code chunks
- ✅ Skips YAML headers
- ✅ Preserves narrative flow

### Quarto Documents

Works identically with `.qmd` files:

```{r qmd, eval=FALSE}
typeRun("analysis.qmd")
```



## Advanced Features

### Custom Evaluation Environment

Run code in an isolated environment to keep your workspace clean:

```{r env}
# Create custom environment
my_env <- new.env()

# Run in that environment
typeRun("demo.R", envir = my_env)

# Check what was created
ls(my_env)
ls()  # Your global environment is unchanged
```

### Suppressing Library Messages

Package loading messages are automatically suppressed:

```{r library}
cat("
library(ggplot2)  # No startup message shown
library(dplyr)    # Clean output

# But code works normally
mtcars %>% head()
", file = "packages.R")

typeRun("packages.R")
# Shows only the actual results, not package messages
```

---

## Output Handling Details

### What Executes Silently

These don't produce output (cleaner demos):

```{r silent}
cat("
# Assignments - silent
x <- 1:10
y <- mean(x)

# Plots - execute but don't clutter console
plot(x, y)
hist(x)

# Package loading - no startup messages
library(stats)
", file = "silent.R")

typeRun("silent.R")
```

### What Shows Output

```{r visible}
cat("
# Direct values
1:10          # Shows the vector

# Function calls
mean(1:10)    # Shows: [1] 5.5

# Print statements
print('Hello') # Shows: [1] 'Hello'

# Model summaries
summary(lm(mpg ~ hp, data = mtcars))  # Shows full summary
", file = "visible.R")

typeRun("visible.R")
```

---

## Practical Examples

### Teaching Linear Regression

```{r teaching}
cat("
# Load data
data(mtcars)
head(mtcars, 3)

# Visualize relationship
plot(mtcars$hp, mtcars$mpg,
     xlab = 'Horsepower',
     ylab = 'Miles per Gallon',
     main = 'MPG vs Horsepower')

# Fit model
model <- lm(mpg ~ hp, data = mtcars)
summary(model)

# Add regression line
abline(model, col = 'red', lwd = 2)

# Predictions
new_data <- data.frame(hp = c(100, 150, 200))
predict(model, new_data)
", file = "teaching_demo.R")

typeRun("teaching_demo.R", delay = 0.08)
```

### Data Analysis Workflow

```{r workflow}
cat("
# 1. Load and explore
data <- iris
str(data)

# 2. Summary statistics
summary(data)

# 3. Visualization
boxplot(Sepal.Length ~ Species, data = data,
        main = 'Sepal Length by Species',
        col = c('lightblue', 'lightgreen', 'pink'))

# 4. Statistical test
aov_result <- aov(Sepal.Length ~ Species, data = data)
summary(aov_result)

# 5. Post-hoc test
TukeyHSD(aov_result)
", file = "analysis_demo.R")

typeRun("analysis_demo.R", delay = 0.06, max_print = 8)
```

### GLM Demonstration

```{r glm-example}
cat("
# Binary outcome: Manual transmission (am)
# Predictors: HP and weight

# Fit logistic regression
logit_model <- glm(am ~ hp + wt, 
                   data = mtcars, 
                   family = binomial(link = 'logit'))

# Model summary
summary(logit_model)

# Odds ratios
exp(coef(logit_model))

# Predicted probabilities
mtcars$pred_prob <- predict(logit_model, type = 'response')
head(mtcars[, c('am', 'hp', 'wt', 'pred_prob')])
", file = "glm_example.R")

typeRun("glm_example.R", max_print = 6)
```

---

## Tips and Best Practices

### 1. Prepare Your Script

Before presenting:
```r
# Test your script normally first
source("demo.R")

# Then test with typeRun
typeRun("demo.R")
```

### 2. Timing Considerations

```r
# For 5-minute demos: ~0.05 delay
typeRun("demo.R", delay = 0.05)

# For dramatic reveals: ~0.1 delay
typeRun("demo.R", delay = 0.1)

# For quick reviews: ~0.02 delay
typeRun("demo.R", delay = 0.02)
```

### 3. Output Management

```r
# Lots of output? Limit it
typeRun("demo.R", max_print = 5)

# Models in script? They'll show nicely
# Plots in script? They'll render silently
```

### 4. Keep Scripts Focused

```r
# Good: One concept per script
typeRun("01_data_loading.R")
typeRun("02_visualization.R")
typeRun("03_modeling.R")

# Less good: One giant script
typeRun("everything.R")  # Too long, hard to control
```

---

## Troubleshooting

### Script Not Found

```r
# Error: The file does not exist
typeRun("missing.R")

# Solution: Check file path
file.exists("demo.R")
list.files(pattern = "\\.R$")
```

### Unexpected Output

```r
# If output looks wrong, test the script normally first
source("demo.R")

# Then try with typeRun
typeRun("demo.R")
```

### Want to Stop Mid-Execution

```r
# Press ESC, then enter 2
# Or press Ctrl+C (on some systems)
```

---

## Comparison Table

| Feature | `typeR()` | `typeRun()` |
|---------|-----------|-------------|
| Typing animation | ✅ | ✅ |
| Code execution | ❌ | ✅ |
| Shows output | ❌ | ✅ |
| Interactive pause/resume | ❌ | ✅ |
| Output truncation | ❌ | ✅ |
| Custom environment | ❌ | ✅ |
| Model summary handling | N/A | ✅ |
| Library message suppression | N/A | ✅ |

---

## See Also

- `?typeR` - Basic typing animation without execution
- `?typeRun` - Full function documentation
- [Package website](https://Fgazzelloni.github.io/typeR/)

---

## Cleanup

```{r cleanup, include=FALSE}
# Remove demo files created in this vignette
files_to_remove <- c(
  "demo.R", "long_output.R", "model_demo.R", "glm_demo.R",
  "report.Rmd", "packages.R", "silent.R", "visible.R",
  "teaching_demo.R", "analysis_demo.R", "glm_example.R"
)
invisible(lapply(files_to_remove, function(f) {
  if (file.exists(f)) file.remove(f)
}))
```
