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R is a powerful programming language for statistical analysis, data manipulation, and visualization. While Base R provides fundamental tools for these tasks, Advanced R extends the language’s capabilities, allowing users to write more efficient, modular and scalable code.

Base R

Base R refers to the core functionalities that come with R upon installation. It includes:

Key Features

1. Built-in Functions and Packages:
   • Statistical methods, mathematical operations, and basic data manipulation tools.
   • E.g., mean(), sum(), plot(), lm().
2. Built-in Datasets:
   • Access to datasets like mtcars, iris, etc., using the data() function.
3. Data Manipulation:
   • Operations such as filtering, subsetting, merging, and reshaping data using functions like subset(), merge(), and reshape().
4. Visualization:
   • Creating plots using plot(), hist(), boxplot(), etc.
5. Basic Programming Constructs:
   • Loops (for, while), conditionals (if, else), and functions (function).
6. Statistical Analysis:
   • T-tests, linear regression (lm()), ANOVA (aov()), and more.

Advantages

• Easy to Learn: Suitable for beginners.
• Comprehensive: Includes tools for most basic statistical tasks.
• No Dependencies: Does not require additional libraries or installations.

Limitations

• Limited Efficiency: Can be slower for large datasets or complex tasks.
• Less Concise: Operations often require more code compared to modern packages.
• Basic Visualizations: Base plotting system lacks advanced features like interactive plots.

Advanced R

Advanced R refers to using additional R capabilities or third-party packages to perform more sophisticated tasks, write efficient code, or handle complex data workflows.

Key Features

1. Packages:

• Using specialized libraries like dplyr, ggplot2, tidyr, shiny, and caret for advanced data manipulation, visualization, and machine learning.

2. Data Manipulation with Tidyverse:

• Tools like dplyr and tidyr make data manipulation more intuitive.
• Example:

library(dplyr)
mtcars %>%
filter(mpg > 20) %>%
summarize(avg_hp = mean(hp))

3. Advanced Visualization:

• Use ggplot2 for layered and customized plots.
• Example:

library(ggplot2)
ggplot(mtcars, aes(x = hp, y = mpg)) +
geom_point(color = "blue") +
labs(title = "HP vs MPG", x = "Horsepower", y = "Miles per Gallon")

4. Efficient Programming:

• Functional programming with purrr.
• Parallel processing for faster computation using packages like parallel or future.

5. Interactive Applications:

• Create web apps and dashboards with shiny.

6. Advanced Statistical Modeling:

• Machine learning and predictive modeling using packages like caret, xgboost, or randomForest.

7. Handling Big Data:

• Work with large datasets using packages like data.table or sparklyr.

8. Object-Oriented Programming (OOP):

• Use R’s OOP systems (S3, S4, and R6) for creating modular and reusable code.

Differences Between Base R and Advanced R

Most standard statistical and data analysis tasks can be performed with Base R. For example:

• Descriptive statistics (mean(), sd()).
• Regression analysis (lm()).
• Data visualization (plot(), boxplot()).

However, for tasks involving large datasets, interactive dashboards, or modern machine learning, Advanced R with specialized libraries is more efficient and user-friendly.

Examples of Base R and Advanced R

Base R Example: Basic Plotting

plot(mtcars$hp, mtcars$mpg, main = "HP vs MPG", xlab = "Horsepower", ylab = "Miles Per Gallon")

Advanced R Example: ggplot2 for Advanced Visualization

library(ggplot2)
ggplot(mtcars, aes(x = hp, y = mpg)) +
geom_point(color = "blue") +
labs(title = "HP vs MPG", x = "Horsepower", y = "Miles Per Gallon")