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  <title>R for Building Energy Simulation</title>

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    <meta name="author" content="Hongyuan Jia" />
  
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<div id="preface" class="section level1 unnumbered">
<h1 class="unnumbered">Preface</h1>
<p>Placeholder</p>
<div id="introduction" class="section level2 unnumbered">
<h2 class="unnumbered">Introduction</h2>
</div>
<div id="structure-of-this-book" class="section level2 unnumbered">
<h2 class="unnumbered">Structure of this book</h2>
</div>
<div id="prerequisites" class="section level2 unnumbered">
<h2 class="unnumbered">Prerequisites</h2>
<div id="r-and-rstudio" class="section level3 unnumbered">
<h3 class="unnumbered">R and RStudio</h3>
</div>
<div id="r-packages" class="section level3 unnumbered">
<h3 class="unnumbered">R Packages</h3>
</div>
<div id="energyplus" class="section level3 unnumbered">
<h3 class="unnumbered">EnergyPlus</h3>
</div>
</div>
<div id="conventions" class="section level2 unnumbered">
<h2 class="unnumbered">Conventions</h2>
</div>
<div id="before-you-begin" class="section level2 unnumbered">
<h2 class="unnumbered">Before you begin</h2>
<div id="r-project" class="section level3 unnumbered">
<h3 class="unnumbered">R Project</h3>
</div>
<div id="scripting" class="section level3 unnumbered">
<h3 class="unnumbered">Scripting</h3>
</div>
<div id="example-files" class="section level3 unnumbered">
<h3 class="unnumbered">Example files</h3>
</div>
<div id="project-structure" class="section level3 unnumbered">
<h3 class="unnumbered">Project structure</h3>
</div>
<div id="style-guide" class="section level3 unnumbered">
<h3 class="unnumbered">Style guide</h3>
<!--chapter:end:index.Rmd-->
</div>
</div>
</div>
<div id="part-r-basics" class="section level1 unnumbered">
<h1 class="unnumbered">(PART) R Basics</h1>
</div>
<div id="r-basics" class="section level1" number="1">
<h1><span class="header-section-number">1</span> Introduction</h1>
<p>This part of the book is intended to provide a sufficient introduction to R to
get you started on the subsequent parts of this book. For a more comprehensive
treatment on the subject, I would recommend <a href="https://r4ds.had.co.nz/index.html">R for Data
Science</a> by Hadley Wickham &amp; Garrett
Grolemund <span class="citation">[<a href="#ref-wickham_r_2016" role="doc-biblioref">1</a>]</span>. The <a href="https://r-graphics.org">R Graphics Cookbook</a>
by Winston Chang <span class="citation">[<a href="#ref-chang_r_2018" role="doc-biblioref">2</a>]</span> is also a useful reference that provides
recipes that allows you to quickly generate plots in R using the <code>{ggplot2}</code>
package.</p>
<!--chapter:end:01-intro.Rmd-->
</div>
<div id="basics" class="section level1" number="2">
<h1><span class="header-section-number">2</span> Basics</h1>
<p>Placeholder</p>
<div id="prerequisites-1" class="section level2" number="2.1">
<h2><span class="header-section-number">2.1</span> Prerequisites</h2>
</div>
<div id="basic-operators" class="section level2" number="2.2">
<h2><span class="header-section-number">2.2</span> Basic operators</h2>
</div>
<div id="basic-data-types" class="section level2" number="2.3">
<h2><span class="header-section-number">2.3</span> Basic data types</h2>
</div>
<div id="basic-data-structures" class="section level2" number="2.4">
<h2><span class="header-section-number">2.4</span> Basic data structures</h2>
</div>
<div id="tibbles" class="section level2" number="2.5">
<h2><span class="header-section-number">2.5</span> Tibbles</h2>
</div>
<div id="data-table" class="section level2" number="2.6">
<h2><span class="header-section-number">2.6</span> data.table</h2>
<!--chapter:end:02-rbasics.Rmd-->
</div>
</div>
<div id="datetime" class="section level1" number="3">
<h1><span class="header-section-number">3</span> Dates and Times</h1>
<p>Placeholder</p>
<div id="prerequisites-2" class="section level2" number="3.1">
<h2><span class="header-section-number">3.1</span> Prerequisites</h2>
</div>
<div id="parsing-dates-and-times" class="section level2" number="3.2">
<h2><span class="header-section-number">3.2</span> Parsing dates and times</h2>
</div>
<div id="extracting-components" class="section level2" number="3.3">
<h2><span class="header-section-number">3.3</span> Extracting components</h2>
<!--chapter:end:03-date.Rmd-->
</div>
</div>
<div id="importing-data" class="section level1" number="4">
<h1><span class="header-section-number">4</span> Importing Data</h1>
<p>Placeholder</p>
<div id="prerequisites-3" class="section level2" number="4.1">
<h2><span class="header-section-number">4.1</span> Prerequisites</h2>
</div>
<div id="finding-your-file" class="section level2" number="4.2">
<h2><span class="header-section-number">4.2</span> Finding your file</h2>
</div>
<div id="parsing-a-csv-file" class="section level2" number="4.3">
<h2><span class="header-section-number">4.3</span> Parsing a csv file</h2>
</div>
<div id="building-data" class="section level2" number="4.4">
<h2><span class="header-section-number">4.4</span> Building data</h2>
<!--chapter:end:04-import.Rmd-->
</div>
</div>
<div id="regex" class="section level1" number="5">
<h1><span class="header-section-number">5</span> Regular expressions</h1>
<p>Placeholder</p>
<div id="prerequisites-4" class="section level2" number="5.1">
<h2><span class="header-section-number">5.1</span> Prerequisites</h2>
</div>
<div id="basic-matches" class="section level2" number="5.2">
<h2><span class="header-section-number">5.2</span> Basic matches</h2>
</div>
<div id="regex-classes" class="section level2" number="5.3">
<h2><span class="header-section-number">5.3</span> Character classes</h2>
</div>
<div id="regex-escape" class="section level2" number="5.4">
<h2><span class="header-section-number">5.4</span> Escaping</h2>
</div>
<div id="anchors" class="section level2" number="5.5">
<h2><span class="header-section-number">5.5</span> Anchors</h2>
</div>
<div id="quantifies" class="section level2" number="5.6">
<h2><span class="header-section-number">5.6</span> Quantifies</h2>
<!--chapter:end:05-regex.Rmd-->
</div>
</div>
<div id="functions" class="section level1" number="6">
<h1><span class="header-section-number">6</span> Functions</h1>
<p>Placeholder</p>
<div id="prerequisites-5" class="section level2" number="6.1">
<h2><span class="header-section-number">6.1</span> Prerequisites</h2>
</div>
<div id="user-defined-function" class="section level2" number="6.2">
<h2><span class="header-section-number">6.2</span> User-defined function</h2>
</div>
<div id="examples" class="section level2" number="6.3">
<h2><span class="header-section-number">6.3</span> Examples</h2>
<!--chapter:end:06-functions.Rmd-->
</div>
</div>
<div id="manipulate" class="section level1" number="7">
<h1><span class="header-section-number">7</span> Manipulating Data</h1>
<p>Placeholder</p>
<div id="prerequisites-6" class="section level2" number="7.1">
<h2><span class="header-section-number">7.1</span> Prerequisites</h2>
</div>
<div id="data-transformation" class="section level2" number="7.2">
<h2><span class="header-section-number">7.2</span> Data transformation</h2>
<div id="select" class="section level3" number="7.2.1">
<h3><span class="header-section-number">7.2.1</span> <code>select()</code></h3>
</div>
<div id="filter" class="section level3" number="7.2.2">
<h3><span class="header-section-number">7.2.2</span> <code>filter()</code></h3>
</div>
<div id="arrange" class="section level3" number="7.2.3">
<h3><span class="header-section-number">7.2.3</span> <code>arrange()</code></h3>
</div>
<div id="mutate" class="section level3" number="7.2.4">
<h3><span class="header-section-number">7.2.4</span> <code>mutate()</code></h3>
</div>
<div id="summarise-and-group_by" class="section level3" number="7.2.5">
<h3><span class="header-section-number">7.2.5</span> <code>summarise()</code> and <code>group_by()</code></h3>
</div>
<div id="across" class="section level3" number="7.2.6">
<h3><span class="header-section-number">7.2.6</span> <code>across()</code></h3>
</div>
</div>
<div id="pipes" class="section level2" number="7.3">
<h2><span class="header-section-number">7.3</span> Pipes</h2>
<!--chapter:end:07-manipulate.Rmd-->
</div>
</div>
<div id="part-get-started" class="section level1 unnumbered">
<h1 class="unnumbered">(PART) Get Started</h1>
</div>
<div id="get-started" class="section level1" number="8">
<h1><span class="header-section-number">8</span> Introduction</h1>
<p>The goal of this part of the book is to get you started working with EnergyPlus
in R as quickly as possible. In this part of the book, you will learn how to get
your model into R and run the simulation (Chapter @ref(parse)). You will then
learn how to extract predifined annual summary reports and manipulate them so
that the focus is placed on the important variables and observations (Chapter
@ref(summary)). Finally, we provide a gentle introduction to visualizing the
data from the summary reports in R (Chapter @ref(visualize)).</p>
<p>Understanding the details of EnergyPlus inputs and outputs and how they are
structured are an important part of building energy simulation. We will come
back to that in the next part of the book once we have gotten you started up
with the basics.</p>
<!--chapter:end:08-start-intro.Rmd-->
</div>
<div id="parse" class="section level1" number="9">
<h1><span class="header-section-number">9</span> Parse then simulate</h1>
<p>Placeholder</p>
<div id="prerequisites-7" class="section level2" number="9.1">
<h2><span class="header-section-number">9.1</span> Prerequisites</h2>
</div>
<div id="key-energyplus-files" class="section level2" number="9.2">
<h2><span class="header-section-number">9.2</span> Key EnergyPlus files</h2>
</div>
<div id="parsing-the-model" class="section level2" number="9.3">
<h2><span class="header-section-number">9.3</span> Parsing the model</h2>
</div>
<div id="simulating-the-model" class="section level2" number="9.4">
<h2><span class="header-section-number">9.4</span> Simulating the model</h2>
<!--chapter:end:09-parse.Rmd-->
</div>
</div>
<div id="summary" class="section level1" number="10">
<h1><span class="header-section-number">10</span> Summary reports</h1>
<p>Placeholder</p>
<div id="prerequisites-8" class="section level2" number="10.1">
<h2><span class="header-section-number">10.1</span> Prerequisites</h2>
</div>
<div id="output-summary-reports" class="section level2" number="10.2">
<h2><span class="header-section-number">10.2</span> Output summary reports</h2>
<!--chapter:end:10-summary.Rmd-->
</div>
</div>
<div id="visualize" class="section level1" number="11">
<h1><span class="header-section-number">11</span> Visualize</h1>
<p>Placeholder</p>
<div id="prerequisites-9" class="section level2" number="11.1">
<h2><span class="header-section-number">11.1</span> Prerequisites</h2>
</div>
<div id="colors" class="section level2" number="11.2">
<h2><span class="header-section-number">11.2</span> Colors</h2>
</div>
<div id="ggplot" class="section level2" number="11.3">
<h2><span class="header-section-number">11.3</span> <code>ggplot()</code></h2>
<div id="functions-and-components" class="section level3" number="11.3.1">
<h3><span class="header-section-number">11.3.1</span> Functions and Components</h3>
</div>
<div id="visualize-end-use" class="section level3" number="11.3.2">
<h3><span class="header-section-number">11.3.2</span> Visualize end use</h3>
</div>
<div id="visualize-weather-data" class="section level3" number="11.3.3">
<h3><span class="header-section-number">11.3.3</span> Visualize weather data</h3>
</div>
<div id="saving-plots" class="section level3" number="11.3.4">
<h3><span class="header-section-number">11.3.4</span> Saving Plots</h3>
<!--chapter:end:11-visualize.Rmd-->
</div>
</div>
</div>
<div id="part-inputs-and-outputs" class="section level1 unnumbered">
<h1 class="unnumbered">(PART) Inputs and Outputs</h1>
</div>
<div id="input-output" class="section level1" number="12">
<h1><span class="header-section-number">12</span> Introduction</h1>
<p>In this part of the book, you will learn EnergyPlus’s input data structure
(Chapter @ref(input)), and how to programmatically query and modify them in R
(Chapter @ref(modify)). We will also point you to the corresponding EnergyPlus
reference documentation that will help you gain a better understanding of the
inner workings of EnergyPlus. Understanding the inputs to a model is important
as the proverb “garbage in, garbage out” clearly spells out. You can have the
best data science workflows but your simulation results would only be as good
the quality of your model and it’s inputs.</p>
<p>Subsequently, you will learn how to extract the more detailed output files
(Chapter @ref(output). You will work with time-series simulation results and
explore them using R’s data transformation and data visualization capabilities
(Chapter @ref(explore)).</p>
<!--chapter:end:12-input-intro.Rmd-->
</div>
<div id="input" class="section level1" number="13">
<h1><span class="header-section-number">13</span> Model Input Structure</h1>
<p>Placeholder</p>
<div id="prerequisites-10" class="section level2" number="13.1">
<h2><span class="header-section-number">13.1</span> Prerequisites</h2>
</div>
<div id="energyplus-documentation" class="section level2" number="13.2">
<h2><span class="header-section-number">13.2</span> EnergyPlus Documentation</h2>
</div>
<div id="energyplus-input-structure" class="section level2" number="13.3">
<h2><span class="header-section-number">13.3</span> EnergyPlus input structure</h2>
</div>
<div id="class-vs-object" class="section level2" number="13.4">
<h2><span class="header-section-number">13.4</span> Class vs Object</h2>
</div>
<div id="model-query" class="section level2" number="13.5">
<h2><span class="header-section-number">13.5</span> Model Query</h2>
<div id="idf-class-methods" class="section level3" number="13.5.1">
<h3><span class="header-section-number">13.5.1</span> <code>Idf</code> class methods</h3>
</div>
<div id="operator" class="section level3" number="13.5.2">
<h3><span class="header-section-number">13.5.2</span> <code>$</code> operator</h3>
</div>
</div>
<div id="object-interdependencies" class="section level2" number="13.6">
<h2><span class="header-section-number">13.6</span> Object interdependencies</h2>
<!--chapter:end:13-input.Rmd-->
</div>
</div>
<div id="modify" class="section level1" number="14">
<h1><span class="header-section-number">14</span> Modify model inputs</h1>
<p>Placeholder</p>
<div id="prerequisites-11" class="section level2" number="14.1">
<h2><span class="header-section-number">14.1</span> Prerequisites</h2>
</div>
<div id="extract-and-modify" class="section level2" number="14.2">
<h2><span class="header-section-number">14.2</span> Extract and Modify</h2>
<div id="single-object" class="section level3" number="14.2.1">
<h3><span class="header-section-number">14.2.1</span> Single object</h3>
</div>
<div id="multiple-objects" class="section level3" number="14.2.2">
<h3><span class="header-section-number">14.2.2</span> Multiple objects</h3>
</div>
</div>
<div id="create-new-objects" class="section level2" number="14.3">
<h2><span class="header-section-number">14.3</span> Create new objects</h2>
<div id="add" class="section level3" number="14.3.1">
<h3><span class="header-section-number">14.3.1</span> add</h3>
</div>
<div id="duplicate" class="section level3" number="14.3.2">
<h3><span class="header-section-number">14.3.2</span> duplicate</h3>
<!--chapter:end:14-modify.Rmd-->
</div>
</div>
</div>
<div id="output" class="section level1" number="15">
<h1><span class="header-section-number">15</span> Detailed output</h1>
<p>Placeholder</p>
<div id="prerequisites-12" class="section level2" number="15.1">
<h2><span class="header-section-number">15.1</span> Prerequisites</h2>
</div>
<div id="variable-dictionary-reports" class="section level2" number="15.2">
<h2><span class="header-section-number">15.2</span> Variable dictionary reports</h2>
</div>
<div id="mtd-file" class="section level2" number="15.3">
<h2><span class="header-section-number">15.3</span> mtd file</h2>
<!--chapter:end:15-output.Rmd-->
</div>
</div>
<div id="explore" class="section level1" number="16">
<h1><span class="header-section-number">16</span> Model Exploration</h1>
<p>Placeholder</p>
<div id="prerequisites-13" class="section level2" number="16.1">
<h2><span class="header-section-number">16.1</span> Prerequisites</h2>
</div>
<div id="extracting" class="section level2" number="16.2">
<h2><span class="header-section-number">16.2</span> Extracting</h2>
</div>
<div id="energy-signature" class="section level2" number="16.3">
<h2><span class="header-section-number">16.3</span> Energy signature</h2>
<!--chapter:end:16-explore.Rmd-->
</div>
</div>
<div id="part-program" class="section level1 unnumbered">
<h1 class="unnumbered">(PART) Program</h1>
</div>
<div id="program" class="section level1" number="17">
<h1><span class="header-section-number">17</span> Introduction</h1>
<!--chapter:end:17-program-intro.Rmd-->
</div>
<div id="energy-efficient-measures" class="section level1" number="18">
<h1><span class="header-section-number">18</span> Energy Efficient Measures</h1>
<!--chapter:end:18-measures.Rmd-->
</div>
<div id="parametric-simulations" class="section level1" number="19">
<h1><span class="header-section-number">19</span> Parametric simulations</h1>
<!--chapter:end:19-parametric.Rmd-->
</div>
<div id="part-advanced" class="section level1 unnumbered">
<h1 class="unnumbered">(PART) Advanced</h1>
</div>
<div id="advanced" class="section level1" number="20">
<h1><span class="header-section-number">20</span> Introduction</h1>
<!--chapter:end:20-advance-intro.Rmd-->
</div>
<div id="design-optimization" class="section level1" number="21">
<h1><span class="header-section-number">21</span> Design optimization</h1>
<!--chapter:end:21-optimization.Rmd-->
</div>
<div id="sensitivity-analysis" class="section level1" number="22">
<h1><span class="header-section-number">22</span> Sensitivity analysis</h1>
<p>Placeholder</p>
<div id="prerequisites-14" class="section level2" number="22.1">
<h2><span class="header-section-number">22.1</span> Prerequisites</h2>
<!--chapter:end:22-sensitivity.Rmd-->
</div>
</div>
<div id="model-calibration" class="section level1" number="23">
<h1><span class="header-section-number">23</span> Model calibration</h1>
<!--chapter:end:23-calibration.Rmd-->
</div>
<div id="part-reproduce" class="section level1 unnumbered">
<h1 class="unnumbered">(PART) Reproduce</h1>
</div>
<div id="reproduce" class="section level1" number="24">
<h1><span class="header-section-number">24</span> Introduction</h1>
<div id="prerequisites-15" class="section level2" number="24.1">
<h2><span class="header-section-number">24.1</span> Prerequisites</h2>
<p>In this chapter we will introduce concepts of reproducibility.</p>
</div>
</div>
<div id="r-markdown" class="section level1" number="25">
<h1><span class="header-section-number">25</span> R Markdown</h1>
</div>
<div id="containers" class="section level1" number="26">
<h1><span class="header-section-number">26</span> Containers</h1>
<!--chapter:end:24-reproduce-intro.Rmd-->
<div id="refs" class="references csl-bib-body">
<div id="ref-wickham_r_2016" class="csl-entry">
<div class="csl-left-margin">[1] </div><div class="csl-right-inline">H. Wickham, G. Grolemund, R for data science: Import, tidy, transform, visualize, and model data, First edition, O’Reilly, Sebastopol, CA, 2016.</div>
</div>
<div id="ref-chang_r_2018" class="csl-entry">
<div class="csl-left-margin">[2] </div><div class="csl-right-inline">W. Chang, R graphics cookbook: Practical recipes for visualizing data, Second edition, O’Reilly, Beijing ; Boston, 2018.</div>
</div>
</div>
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