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practice-day2-analysis.html
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practice-day2-analysis.html
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<meta charset="utf-8">
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<title>Practice Day 2</title>
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<body class="fullcontent">
<div id="quarto-content" class="page-columns page-rows-contents page-layout-article">
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<header id="title-block-header" class="quarto-title-block default">
<div class="quarto-title">
<h1 class="title">Practice Day 2</h1>
</div>
<div class="quarto-title-meta">
</div>
</header>
<section id="goals" class="level2">
<h2 class="anchored" data-anchor-id="goals">Goals</h2>
<p>To learn about: arrange, filter, slice, group_by, summarize</p>
<p>To find several values from our data:</p>
<ul>
<li>The coldest and warmest days</li>
<li>The rainiest and snowiest days</li>
<li>Years with most snow days</li>
<li>Years with most 100+ days</li>
<li>Years with most rain</li>
<li>Earliest day to reach 100+ each year</li>
</ul>
<p>With this lesson we’ll just use Texas data. (You theoretically could use a different state, but would need to adjust your code to import the right data, use valid cities, etc.)</p>
</section>
<section id="setup" class="level2">
<h2 class="anchored" data-anchor-id="setup">Setup</h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb1"><pre class="sourceCode r code-with-copy"><code class="sourceCode r"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">library</span>(tidyverse)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="import" class="level2">
<h2 class="anchored" data-anchor-id="import">Import</h2>
<p>Import your cleaned data using <code>read_rds()</code> and save it into an object:</p>
</section>
<section id="arrange" class="level2">
<h2 class="anchored" data-anchor-id="arrange">Arrange</h2>
<p>Find the coldest day, warmest day, most snow, most rain.</p>
<section id="coldest-day" class="level3">
<h3 class="anchored" data-anchor-id="coldest-day">Coldest day</h3>
<p>Find the coldest day:</p>
</section>
<section id="hotest-day" class="level3">
<h3 class="anchored" data-anchor-id="hotest-day">Hotest day</h3>
<p>Find the hottest day:</p>
</section>
<section id="oyo-most-rain" class="level3">
<h3 class="anchored" data-anchor-id="oyo-most-rain">OYO: Most rain</h3>
<p>Find the days with the most rain:</p>
</section>
<section id="oyo-most-snow" class="level3">
<h3 class="anchored" data-anchor-id="oyo-most-snow">OYO: Most snow</h3>
<p>Find the days with the most snow:</p>
</section>
</section>
<section id="filter" class="level2">
<h2 class="anchored" data-anchor-id="filter">Filter</h2>
<p>Find days that are 100+:</p>
<p>Filter for days in Dallas that are 100+:</p>
<p>Find days where it snowed, or there is snow still on the ground:</p>
<section id="oyo-snow-days-in-dallas" class="level3">
<h3 class="anchored" data-anchor-id="oyo-snow-days-in-dallas">OYO: Snow days in Dallas</h3>
<p>Find days where it snowed or there is snow on the ground, but only in Dallas.</p>
</section>
</section>
<section id="slice" class="level2">
<h2 class="anchored" data-anchor-id="slice">Slice</h2>
<p>Use slice_min to find the coldest day in our data:</p>
</section>
<section id="group-and-slice" class="level2">
<h2 class="anchored" data-anchor-id="group-and-slice">Group and slice</h2>
<p>Add <code>group_by</code> to find the coldest day in each city.</p>
<section id="oyo-hottest-day-in-each-city" class="level3">
<h3 class="anchored" data-anchor-id="oyo-hottest-day-in-each-city">OYO: Hottest day in each city</h3>
<p>Use <code>group_by</code> and <code>slice_max</code> to find the hottest days in each city. Note there might be some ties.</p>
</section>
<section id="multiple-groups" class="level3">
<h3 class="anchored" data-anchor-id="multiple-groups">Multiple groups</h3>
<p>Hottest day each year in each city:</p>
</section>
</section>
<section id="summarize" class="level2">
<h2 class="anchored" data-anchor-id="summarize">Summarize</h2>
<p>Summarize to find our first date, last date and number of rows:</p>
</section>
<section id="group-and-summarize" class="level2">
<h2 class="anchored" data-anchor-id="group-and-summarize">Group and summarize</h2>
<p>Group the data by city and find the first date, last date and number of rows:</p>
<p>Add city and yr as a group:</p>
</section>
<section id="group-and-summarize-count" class="level2">
<h2 class="anchored" data-anchor-id="group-and-summarize-count">Group and summarize: Count</h2>
<p>Find the number of days in Austin that were 100+. Start first with prepping the data to get the date ranges we need:</p>
<p>Then do the calculation to get hot days:</p>
<p>Find the years with the most 100+ degree days in each city.</p>
<section id="oyo-most-snow-days-by-city-each-year" class="level3">
<h3 class="anchored" data-anchor-id="oyo-most-snow-days-by-city-each-year">OYO: Most snow days by city each year</h3>
<p>Count only the days that where it snowed.</p>
</section>
</section>
<section id="group-and-summarize-math" class="level2">
<h2 class="anchored" data-anchor-id="group-and-summarize-math">Group and Summarize: Math</h2>
<p>Years with most rain in each city.</p>
<p>The most rain in each city, sliced:</p>
<p>The least rain in each city, sliced:</p>
<section id="oyo-years-with-most-snow" class="level3">
<h3 class="anchored" data-anchor-id="oyo-years-with-most-snow">OYO: Years with most snow</h3>
<p>Find the years with the most total snow in each city</p>
<p>Most snow, sliced:</p>
</section>
</section>
<section id="working-through-logic" class="level2">
<h2 class="anchored" data-anchor-id="working-through-logic">Working through logic</h2>
<p>Getting average monthly rain for each city.</p>
<p>First get the total rain for each month/year:</p>
<p>Then calculate the average for the months in each city:</p>
<p>And as a tease, we plot it:</p>
</section>
<section id="challenge-earliest-100-day-each-city" class="level2">
<h2 class="anchored" data-anchor-id="challenge-earliest-100-day-each-city">Challenge: Earliest 100+ day each city</h2>
<p>For each city, find the earliest day of a year in which it reached 100 degrees.</p>
</section>
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