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<title>Data Carpentry lesson on tidy data</title>
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<h1 class="title">Data Carpentry lesson on tidy data</h1>
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<p>This is a lesson on tidying data. Specifically, what to do when a conceptual variable is spread out over 2 or more variables in a data frame.</p>
<p>Data used: words spoken by characters of different races and gender in the Lord of the Rings movie trilogy</p>
<ul>
<li><a href="https://github.com/datacarpentry/datacarpentry/tree/master/lessons/tidy-data">directory of this lesson</a> in the Data Carpentry GitHub repo</li>
<li><a href="https://github.com/datacarpentry/datacarpentry/blob/master/lessons/tidy-data/01-intro.md">01-intro</a> shows untidy and tidy data. Then we demonstrate how tidy data is more useful for analysis and visualization. Includes references, resources, and exercises.</li>
<li><a href="https://github.com/datacarpentry/datacarpentry/blob/master/lessons/tidy-data/02-tidy.md">02-tidy</a> shows <strong>how</strong> to tidy data, using <code>gather()</code> from the <code>tidyr</code> package. Includes references, resources, and exercises.</li>
<li><a href="https://github.com/datacarpentry/datacarpentry/blob/master/lessons/tidy-data/03-tidy-bonus-content.md">03-tidy-bonus-content</a> is not part of the lesson but may be useful as learners try to apply the principles of tidy data in more general settings. Includes links to packages used.</li>
</ul>
<p>Learner-facing dependencies:</p>
<ul>
<li>files in the <code>tidy-data</code> sub-directory of the Data Carpentry <code>data</code> directory</li>
<li><code>tidyr</code> package (only true dependency)</li>
<li><code>ggplot2</code> is used for illustration but is not mission critical</li>
<li><code>dplyr</code> and <code>reshape2</code> are used in the bonus content</li>
</ul>
<p>Instructor dependencies:</p>
<ul>
<li><code>curl</code> if you execute the code to grab the Lord of the Rings data used in examples from GitHub. Note that the files are also included in the <code>datacarpentry/data/tidy-data</code> directory, so data download is avoidable.</li>
<li><code>rmarkdown</code>, <code>knitr</code>, and <code>xtable</code> if you want to compile the <code>Rmd</code> to <code>md</code> and <code>html</code></li>
</ul>
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