R is quickly becoming the statistical software of choice for researchers and analysts in a variety of disciplines. In recent years, it has surpassed many commonly used statistical programs in both number of users and availability of statistical methods. A fundamental difference between R and other statistical software packages is that R is open-source, meaning it is both free for download and the source code is available under the GNU General Project License. Anyone can contribute new techniques or analytical methods, which has been a primary factor enabling the growth of R. These contributions are called `packages’. Currently, almost 6000 packages are available for R. Installing R and Optional RStudio