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<h1 class="title toc-ignore">Motivation for R</h1>
</div>
<div id="what-is-r" class="section level2">
<h2>What is R?</h2>
<p>R is a number of things, simultaneously. Depending on who you ask, R is:</p>
<ul>
<li>A software package</li>
<li>A programming language</li>
<li>A toolkit for developing statistical and analytical tools</li>
<li>An extensive library of statistical and mathematical software and algorithms</li>
<li>A scripting language</li>
<li>A complete data science environment</li>
<li>…</li>
</ul>
</div>
<div id="why-use-r" class="section level2">
<h2>Why use R?</h2>
<ul>
<li>R is cross-platform and runs on Windows, Mac, and Linux (as well as more obscure systems).</li>
<li>R provides a vast number of useful statistical tools, many of which have been painstakingly tested.</li>
<li>R produces publication-quality graphics in a variety of formats.</li>
<li>R plays well with FORTRAN, C, and scripts in many languages.</li>
<li>R scales, making it useful for small and large projects. It is NOT Excel.</li>
<li>R does not have a meaningfully useful graphical user interface (GUI).</li>
</ul>
</div>
<div id="why-not-use-r" class="section level2">
<h2>Why not use R?</h2>
<ul>
<li>R cannot do everything.</li>
<li>R is not always the “best” tool for the job.</li>
<li>R will <em>not</em> hold your hand. Often, it will <em>slap</em> your hand instead.</li>
<li>The documentation can be opaque (but there is documentation).</li>
<li>R can drive you crazy (on a good day) or age you prematurely (on a bad one).</li>
<li>Finding the right package to do the job you want to do can be challenging; worse, some contributed packages are unreliable.</li>
<li>R does not have a meaningfully useful graphical user interface (GUI).</li>
</ul>
</div>
<div id="r-license-and-the-open-source-ideal" class="section level2">
<h2>R License and the Open Source Ideal</h2>
<p>R is free (yes, totally free!) and distributed under GNU license. In particular, this license allows one to:</p>
<ul>
<li>Download the source code</li>
<li>Modify the source code to your heart’s content</li>
<li>Distribute the modified source code and even charge money for it, but you must distribute the modified source code under the original GNU license]{}</li>
</ul>
<p>This license means that R will always be available, will always be open source, and can grow organically without constraint.</p>
</div>
<div id="r-and-data-science" class="section level2">
<h2>R and Data Science</h2>
<p>Data Science is both a field of study and a process. All of us practice data science when using R.</p>
<div class="centered">
<div class="figure">
<img src="images/data-science-explore.png" alt="" />
<p class="caption">The data science process.</p>
</div>
</div>
<p>R has capabilities and shines in all aspects of the data science process.</p>
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