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Introduction to R Programming

Lesson 9: R Packages and Libraries

Lesson 9: R Packages and Libraries

R has a vast library of packages, which are collections of functions, data, and documentation that extend the capabilities of R. These packages are maintained by the R community and can be easily installed using the install.packages() function. There are thousands of packages available for various purposes, such as data visualization, statistical analysis, machine learning, and more.

Some popular packages for data visualization are ggplot2, lattice, and plotly. For statistical analysis, some popular packages are dplyr, tidyr, and plyr. For machine learning, some popular packages are caret, mlr, and randomForest. It's important to note that there are often multiple packages that can perform similar tasks, so it's a good idea to explore different options and find the one that best suits your needs.

To use a package in R, you first need to load it using the library() function. For example, to load the ggplot2 package, you would use the following command: library(ggplot2). Once a package is loaded, you can access its functions and data. You can also view the documentation for a package using the help() function, or by typing a question mark followed by the package or function name, like this: ?ggplot2.

It's important to keep your packages up-to-date, as new versions are often released with bug fixes and additional features. You can update all installed packages by running the update.packages() function. You can also check for outdated packages using the packageStatus() function.

Further Reading

  • R Packages

    : A comprehensive guide to developing your own R packages.
  • CRAN Task Views

    : A curated list of packages grouped by topic, maintained by the R community.
  • Tidyverse

    : A collection of packages designed for data science, including ggplot2, dplyr, and tidyr.
  • Machine Learning Mastery

    : A website dedicated to machine learning with R.
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