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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="pandoc" />
<title>Create a simple, functioning script</title>
<script src="site_libs/jquery-1.11.3/jquery.min.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link href="site_libs/bootstrap-3.3.5/css/cosmo.min.css" rel="stylesheet" />
<script src="site_libs/bootstrap-3.3.5/js/bootstrap.min.js"></script>
<script src="site_libs/bootstrap-3.3.5/shim/html5shiv.min.js"></script>
<script src="site_libs/bootstrap-3.3.5/shim/respond.min.js"></script>
<script src="site_libs/jqueryui-1.11.4/jquery-ui.min.js"></script>
<link href="site_libs/tocify-1.9.1/jquery.tocify.css" rel="stylesheet" />
<script src="site_libs/tocify-1.9.1/jquery.tocify.js"></script>
<script src="site_libs/navigation-1.1/tabsets.js"></script>
<link href="site_libs/highlightjs-9.12.0/textmate.css" rel="stylesheet" />
<script src="site_libs/highlightjs-9.12.0/highlight.js"></script>
<script src="site_libs/kePrint-0.0.1/kePrint.js"></script>
<link href="site_libs/font-awesome-5.0.13/css/fa-svg-with-js.css" rel="stylesheet" />
<script src="site_libs/font-awesome-5.0.13/js/fontawesome-all.min.js"></script>
<script src="site_libs/font-awesome-5.0.13/js/fa-v4-shims.min.js"></script>
<style type="text/css">code{white-space: pre;}</style>
<style type="text/css">
pre:not([class]) {
background-color: white;
}
</style>
<script type="text/javascript">
if (window.hljs) {
hljs.configure({languages: []});
hljs.initHighlightingOnLoad();
if (document.readyState && document.readyState === "complete") {
window.setTimeout(function() { hljs.initHighlighting(); }, 0);
}
}
</script>
<style type="text/css">
h1 {
font-size: 34px;
}
h1.title {
font-size: 38px;
}
h2 {
font-size: 30px;
}
h3 {
font-size: 24px;
}
h4 {
font-size: 18px;
}
h5 {
font-size: 16px;
}
h6 {
font-size: 12px;
}
.table th:not([align]) {
text-align: left;
}
</style>
<link rel="stylesheet" href="styles.css" type="text/css" />
</head>
<body>
<style type = "text/css">
.main-container {
max-width: 940px;
margin-left: auto;
margin-right: auto;
}
code {
color: inherit;
background-color: rgba(0, 0, 0, 0.04);
}
img {
max-width:100%;
height: auto;
}
.tabbed-pane {
padding-top: 12px;
}
.html-widget {
margin-bottom: 20px;
}
button.code-folding-btn:focus {
outline: none;
}
</style>
<style type="text/css">
/* padding for bootstrap navbar */
body {
padding-top: 51px;
padding-bottom: 40px;
}
/* offset scroll position for anchor links (for fixed navbar) */
.section h1 {
padding-top: 56px;
margin-top: -56px;
}
.section h2 {
padding-top: 56px;
margin-top: -56px;
}
.section h3 {
padding-top: 56px;
margin-top: -56px;
}
.section h4 {
padding-top: 56px;
margin-top: -56px;
}
.section h5 {
padding-top: 56px;
margin-top: -56px;
}
.section h6 {
padding-top: 56px;
margin-top: -56px;
}
</style>
<script>
// manage active state of menu based on current page
$(document).ready(function () {
// active menu anchor
href = window.location.pathname
href = href.substr(href.lastIndexOf('/') + 1)
if (href === "")
href = "index.html";
var menuAnchor = $('a[href="' + href + '"]');
// mark it active
menuAnchor.parent().addClass('active');
// if it's got a parent navbar menu mark it active as well
menuAnchor.closest('li.dropdown').addClass('active');
});
</script>
<div class="container-fluid main-container">
<!-- tabsets -->
<script>
$(document).ready(function () {
window.buildTabsets("TOC");
});
</script>
<!-- code folding -->
<script>
$(document).ready(function () {
// move toc-ignore selectors from section div to header
$('div.section.toc-ignore')
.removeClass('toc-ignore')
.children('h1,h2,h3,h4,h5').addClass('toc-ignore');
// establish options
var options = {
selectors: "h1,h2",
theme: "bootstrap3",
context: '.toc-content',
hashGenerator: function (text) {
return text.replace(/[.\\/?&!#<>]/g, '').replace(/\s/g, '_').toLowerCase();
},
ignoreSelector: ".toc-ignore",
scrollTo: 0
};
options.showAndHide = true;
options.smoothScroll = true;
// tocify
var toc = $("#TOC").tocify(options).data("toc-tocify");
});
</script>
<style type="text/css">
#TOC {
margin: 25px 0px 20px 0px;
}
@media (max-width: 768px) {
#TOC {
position: relative;
width: 100%;
}
}
.toc-content {
padding-left: 30px;
padding-right: 40px;
}
div.main-container {
max-width: 1200px;
}
div.tocify {
width: 20%;
max-width: 260px;
max-height: 85%;
}
@media (min-width: 768px) and (max-width: 991px) {
div.tocify {
width: 25%;
}
}
@media (max-width: 767px) {
div.tocify {
width: 100%;
max-width: none;
}
}
.tocify ul, .tocify li {
line-height: 20px;
}
.tocify-subheader .tocify-item {
font-size: 0.90em;
padding-left: 25px;
text-indent: 0;
}
.tocify .list-group-item {
border-radius: 0px;
}
</style>
<!-- setup 3col/9col grid for toc_float and main content -->
<div class="row-fluid">
<div class="col-xs-12 col-sm-4 col-md-3">
<div id="TOC" class="tocify">
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<a class="navbar-brand" href="index.html">GEO 503: Spatial Data Science</a>
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<a href="00_CourseIntroductionFrame.html">00 Course Introduction</a>
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<div class="fluid-row" id="header">
<h1 class="title toc-ignore">Create a simple, functioning script</h1>
<h3 class="subtitle"><em>Write a script that reads in data, calculates a statistic, and makes a plot.</em></h3>
</div>
<div id="reading" class="section level1">
<h1>Reading</h1>
<ul>
<li>R4DS <a href="http://r4ds.had.co.nz/introduction.html">Chapter 1</a></li>
<li>R4DS <a href="http://r4ds.had.co.nz/explore-intro.html">Chapter 2</a></li>
<li>Datacamp’s <a href="https://www.datacamp.com/community/tutorials/make-histogram-basic-r"><em>How to Make a Histogram with Basic R</em></a></li>
<li>Datacamp’s <a href="https://www.datacamp.com/community/tutorials/make-histogram-ggplot2"><em>How to Make a Histogram with ggplot</em></a></li>
</ul>
</div>
<div id="background" class="section level1">
<h1>Background</h1>
<p>You are working on a new project and your colleague has asked you to calculate the mean Petal Length in the dataset she collected in the field.</p>
<p>It looks like this:</p>
<div style="border: 1px solid #ddd; padding: 5px; overflow-y: scroll; height:200px; overflow-x: scroll; width:100%; ">
<table class="table" style="margin-left: auto; margin-right: auto;">
<thead>
<tr>
<th style="text-align:right;">
Sepal.Length
</th>
<th style="text-align:right;">
Sepal.Width
</th>
<th style="text-align:right;">
Petal.Length
</th>
<th style="text-align:right;">
Petal.Width
</th>
<th style="text-align:left;">
Species
</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:right;">
5.1
</td>
<td style="text-align:right;">
3.5
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.9
</td>
<td style="text-align:right;">
3.0
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.7
</td>
<td style="text-align:right;">
3.2
</td>
<td style="text-align:right;">
1.3
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.6
</td>
<td style="text-align:right;">
3.1
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.0
</td>
<td style="text-align:right;">
3.6
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.4
</td>
<td style="text-align:right;">
3.9
</td>
<td style="text-align:right;">
1.7
</td>
<td style="text-align:right;">
0.4
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.6
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.3
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.0
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.4
</td>
<td style="text-align:right;">
2.9
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.9
</td>
<td style="text-align:right;">
3.1
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.1
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.4
</td>
<td style="text-align:right;">
3.7
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.8
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.6
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.8
</td>
<td style="text-align:right;">
3.0
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.1
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.3
</td>
<td style="text-align:right;">
3.0
</td>
<td style="text-align:right;">
1.1
</td>
<td style="text-align:right;">
0.1
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.8
</td>
<td style="text-align:right;">
4.0
</td>
<td style="text-align:right;">
1.2
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.7
</td>
<td style="text-align:right;">
4.4
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.4
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.4
</td>
<td style="text-align:right;">
3.9
</td>
<td style="text-align:right;">
1.3
</td>
<td style="text-align:right;">
0.4
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.1
</td>
<td style="text-align:right;">
3.5
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.3
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.7
</td>
<td style="text-align:right;">
3.8
</td>
<td style="text-align:right;">
1.7
</td>
<td style="text-align:right;">
0.3
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.1
</td>
<td style="text-align:right;">
3.8
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.3
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.4
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.7
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.1
</td>
<td style="text-align:right;">
3.7
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.4
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.6
</td>
<td style="text-align:right;">
3.6
</td>
<td style="text-align:right;">
1.0
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.1
</td>
<td style="text-align:right;">
3.3
</td>
<td style="text-align:right;">
1.7
</td>
<td style="text-align:right;">
0.5
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.8
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.9
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.0
</td>
<td style="text-align:right;">
3.0
</td>
<td style="text-align:right;">
1.6
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.0
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.6
</td>
<td style="text-align:right;">
0.4
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.2
</td>
<td style="text-align:right;">
3.5
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.2
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.4
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.7
</td>
<td style="text-align:right;">
3.2
</td>
<td style="text-align:right;">
1.6
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
4.8
</td>
<td style="text-align:right;">
3.1
</td>
<td style="text-align:right;">
1.6
</td>
<td style="text-align:right;">
0.2
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">
5.4
</td>
<td style="text-align:right;">
3.4
</td>
<td style="text-align:right;">
1.5
</td>
<td style="text-align:right;">
0.4
</td>
<td style="text-align:left;">
setosa
</td>
</tr>
<tr>
<td style="text-align:right;">