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542_Presentation.html
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<!DOCTYPE html>
<html lang="en"><head>
<script src="542_Presentation_files/libs/clipboard/clipboard.min.js"></script>
<script src="542_Presentation_files/libs/quarto-html/tabby.min.js"></script>
<script src="542_Presentation_files/libs/quarto-html/popper.min.js"></script>
<script src="542_Presentation_files/libs/quarto-html/tippy.umd.min.js"></script>
<link href="542_Presentation_files/libs/quarto-html/tippy.css" rel="stylesheet">
<link href="542_Presentation_files/libs/quarto-html/light-border.css" rel="stylesheet">
<link href="542_Presentation_files/libs/quarto-html/quarto-html.min.css" rel="stylesheet" data-mode="light">
<link href="542_Presentation_files/libs/quarto-html/quarto-syntax-highlighting.css" rel="stylesheet" id="quarto-text-highlighting-styles"><meta charset="utf-8">
<meta name="generator" content="quarto-1.3.433">
<meta name="author" content="Lucas McPherron, Alex Holmes, Tyler Dykes, Aria Sajjad">
<title>Pakistani Used Car Sales</title>
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="542_Presentation_files/libs/revealjs/dist/reset.css">
<link rel="stylesheet" href="542_Presentation_files/libs/revealjs/dist/reveal.css">
<style>
code{white-space: pre-wrap;}
span.smallcaps{font-variant: small-caps;}
div.columns{display: flex; gap: min(4vw, 1.5em);}
div.column{flex: auto; overflow-x: auto;}
div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
ul.task-list{list-style: none;}
ul.task-list li input[type="checkbox"] {
width: 0.8em;
margin: 0 0.8em 0.2em -1em; /* quarto-specific, see https://github.com/quarto-dev/quarto-cli/issues/4556 */
vertical-align: middle;
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/* CSS for syntax highlighting */
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code.sourceCode > span { color: inherit; text-decoration: inherit; }
div.sourceCode { margin: 1em 0; }
pre.sourceCode { margin: 0; }
@media screen {
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@media print {
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pre.numberSource code
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pre.numberSource code > span
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pre.numberSource code > span > a:first-child::before
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position: relative; left: -1em; text-align: right; vertical-align: baseline;
border: none; display: inline-block;
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padding: 0 4px; width: 4em;
}
pre.numberSource { margin-left: 3em; padding-left: 4px; }
div.sourceCode
{ color: #24292e; }
@media screen {
pre > code.sourceCode > span > a:first-child::before { text-decoration: underline; }
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code span { color: #24292e; } /* Normal */
code span.al { color: #ff5555; font-weight: bold; } /* Alert */
code span.an { color: #6a737d; } /* Annotation */
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code span.cf { color: #d73a49; } /* ControlFlow */
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code span.co { color: #6a737d; } /* Comment */
code span.cv { color: #6a737d; } /* CommentVar */
code span.do { color: #6a737d; } /* Documentation */
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<link href="542_Presentation_files/libs/revealjs/plugin/quarto-support/footer.css" rel="stylesheet">
<style type="text/css">
.callout {
margin-top: 1em;
margin-bottom: 1em;
border-radius: .25rem;
}
.callout.callout-style-simple {
padding: 0em 0.5em;
border-left: solid #acacac .3rem;
border-right: solid 1px silver;
border-top: solid 1px silver;
border-bottom: solid 1px silver;
display: flex;
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border-left: solid #acacac .3rem;
border-right: solid 1px silver;
border-top: solid 1px silver;
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font-weight: 400;
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margin-bottom: 0.5em;
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margin-top: 0.7em;
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border-bottom: none;
font-size: .9rem;
font-weight: 600;
opacity: 75%;
}
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font-weight: 600;
opacity: 85%;
font-size: 0.9rem;
padding-left: 0.5em;
padding-right: 0.5em;
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padding-right: 0.5em;
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width: 1rem;
display: inline-block;
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background-repeat: no-repeat;
background-size: 1rem 1rem;
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width: 0.9rem;
display: inline-block;
content: "";
background-repeat: no-repeat;
background-size: 0.9rem 0.9rem;
}
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display: flex
}
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margin-top: 1rem;
padding-right: .5rem;
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.callout.no-icon::before {
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}
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margin-bottom: 0.5rem;
}
.callout.callout-titled .callout-icon::before {
margin-top: .5rem;
padding-right: .5rem;
}
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margin-top: 1rem;
padding-right: .5rem;
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border-left-color: #4582ec !important;
}
div.callout-note .callout-icon::before {
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}
div.callout-note.callout-style-default .callout-title {
background-color: #dae6fb
}
div.callout-important {
border-left-color: #d9534f !important;
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<body class="quarto-light">
<div class="reveal">
<div class="slides">
<section id="title-slide" class="quarto-title-block center">
<h1 class="title">Pakistani Used Car Sales</h1>
<div class="quarto-title-authors">
<div class="quarto-title-author">
<div class="quarto-title-author-name">
Lucas McPherron, Alex Holmes, Tyler Dykes, Aria Sajjad
</div>
<p class="quarto-title-affiliation">
BZAN 542 - Data Mining Project
</p>
</div>
</div>
</section>
<section id="data-source" class="slide level2">
<h2>Data Source</h2>
<ul>
<li class="fragment"><a href="https://www.kaggle.com/datasets/talhabarkaatahmad/pakistan-used-car-prices-2023">Kaggle</a></li>
<li class="fragment">Scraped from <a href="https://www.pakwheels.com/">PakWheels</a> Ads</li>
</ul>
<div class="cell">
<div class="cell-output cell-output-stdout">
<pre><code> addref city assembly body make model year engine transmission
1 7943732 Peshawar Local Sedan Toyota Corolla 2013 1300 Manual
2 7730314 Lahore Local Sedan Honda City 2000 1300 Manual
3 7943737 Lahore Local Sedan Toyota Yaris 2021 1300 Manual
4 7943733 Lahore Local Hatchback Suzuki Swift 2017 1300 Manual
5 7923484 Lahore Local Sedan Honda Civic 2017 1800 Automatic
6 7943736 Vehari Imported Sedan Honda Civic 2010 1300 Automatic</code></pre>
</div>
</div>
</section>
<section id="motivation-and-goal" class="slide level2">
<h2>Motivation and Goal</h2>
<ul>
<li class="fragment">Predict Highest Priced Cars</li>
<li class="fragment">Have the Lowest Error Possible</li>
</ul>
</section>
<section id="data-cleaning" class="slide level2">
<h2>Data Cleaning</h2>
<ul>
<li class="fragment">Defined what a luxury car is for study</li>
<li class="fragment">Changed price to USD</li>
<li class="fragment">Filtered out redundant information</li>
<li class="fragment">Created fuzzy colors column to help with color analysis</li>
<li class="fragment">‘Effect’ encoded all character columns</li>
<li class="fragment">Created log(usd) and sqrt(mileage) columns to help with skewness</li>
</ul>
</section>
<section>
<section id="exploratory-data-analysis" class="title-slide slide level1 center">
<h1>Exploratory Data Analysis</h1>
</section>
<section id="mostly-cars-from-2000s-and-up" class="slide level2 scrollable">
<h2>Mostly Cars from 2000’s and Up</h2>
<img data-src="542_Presentation_files/figure-revealjs/car_sales-1.png" width="960" class="r-stretch"></section>
<section id="highly-skewed-used-car-sales-pricing" class="slide level2">
<h2>Highly Skewed Used Car Sales Pricing</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-2-1.png" width="960" class="r-stretch"></section>
<section id="log-usd-fixes-skewness" class="slide level2">
<h2>Log USD Fixes Skewness</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-3-1.png" width="960" class="r-stretch"></section>
<section id="same-issue-with-mileage" class="slide level2">
<h2>Same Issue with Mileage</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-4-1.png" width="960" class="r-stretch"></section>
<section id="square-root-transformation" class="slide level2">
<h2>Square Root Transformation</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-5-1.png" width="960" class="r-stretch"></section>
<section id="distribution-between-fuel-types-and-transmissions-are-similar" class="slide level2">
<h2>Distribution between Fuel Types and Transmissions are Similar</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-6-1.png" width="960" class="r-stretch quarto-figure-center"></section>
<section id="most-local-cars-are-manual-transmission" class="slide level2">
<h2>Most Local Cars are Manual Transmission</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-7-1.png" width="960" class="r-stretch"></section>
<section id="top-3-body-styles-by-logprice-suvs-highest-median-price" class="slide level2">
<h2>Top 3 Body Styles by Log(Price), SUV’s Highest Median Price</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-8-1.png" width="960" class="r-stretch"></section>
<section id="mercedes-and-kia-have-highest-average-price-out-of-top-10-makes" class="slide level2">
<h2>Mercedes and Kia have Highest Average Price out of Top 10 Makes</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-9-1.png" width="960" class="r-stretch"></section>
<section id="top-10-fuzzy-colors-by-average-price" class="slide level2">
<h2>Top 10 Fuzzy Colors by Average Price</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-10-1.png" width="960" class="r-stretch"></section>
<section id="relationship-between-mileage-and-logprice-oddly-linear" class="slide level2">
<h2>Relationship Between Mileage and log(Price) oddly linear</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-11-1.png" width="960" class="r-stretch"></section></section>
<section>
<section id="data-preprocessing" class="title-slide slide level1 center">
<h1>Data Preprocessing</h1>
</section>
<section id="our-recipe" class="slide level2" data-auto-animate="true,.smaller">
<h2 data-id="quarto-animate-title">Our Recipe</h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb2" data-code-line-numbers="|3,4|"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb2-1" class="hljs-ln-code"><a href="#cb2-1"></a><span class="fu">recipe</span>(usd <span class="sc">~</span> .,<span class="at">data=</span>car_train) <span class="sc">|></span> </span>
<span id="cb2-2" class="hljs-ln-code"><a href="#cb2-2"></a> <span class="fu">step_rm</span>(addref,color,price) <span class="sc">|></span> </span>
<span id="cb2-3" class="hljs-ln-code"><a href="#cb2-3"></a> <span class="fu">step_lencode_mixed</span>(<span class="fu">all_nominal_predictors</span>(),<span class="sc">-</span>fuel,<span class="sc">-</span>transmission,</span>
<span id="cb2-4" class="hljs-ln-code"><a href="#cb2-4"></a> <span class="sc">-</span>assembly, <span class="at">outcome =</span> <span class="fu">vars</span>(usd)) <span class="sc">|></span> </span>
<span id="cb2-5" class="hljs-ln-code"><a href="#cb2-5"></a> <span class="fu">step_dummy</span>(<span class="fu">all_nominal_predictors</span>(),<span class="at">one_hot =</span> <span class="cn">TRUE</span>) <span class="sc">|></span></span>
<span id="cb2-6" class="hljs-ln-code"><a href="#cb2-6"></a> <span class="fu">step_zv</span>(<span class="fu">all_predictors</span>()) <span class="sc">|></span></span>
<span id="cb2-7" class="hljs-ln-code"><a href="#cb2-7"></a> <span class="fu">step_normalize</span>(<span class="fu">all_numeric_predictors</span>()) <span class="sc">|></span> </span>
<span id="cb2-8" class="hljs-ln-code"><a href="#cb2-8"></a> <span class="fu">step_corr</span>(<span class="fu">all_numeric_predictors</span>(), <span class="at">threshold =</span> <span class="fl">0.9</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<ul>
<li class="fragment">Drop <code>addref</code>, <code>color</code>, <code>price</code> columns</li>
<li class="fragment">Encode all nominal predictors</li>
<li class="fragment">One hot encode all nominal predictors</li>
<li class="fragment">Drop Variables with Near Zero Variance</li>
<li class="fragment">Normalize all numeric predictors</li>
<li class="fragment">Drop highly correlated numeric predictors</li>
</ul>
</section>
<section id="data-after-preprocssing" class="slide level2">
<h2>Data After Preprocssing</h2>
<div class="cell">
<div class="cell-output cell-output-stdout">
<pre><code># A tibble: 6 × 9
city assembly body make model year engine transmission fuel
<dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
1 0.917 -0.591 -0.0408 -0.0560 -0.191 -1.87 -0.151 -1.10 -0.250
2 0.917 -0.591 -0.686 -0.908 -0.757 0.789 -0.943 -1.10 -0.250
3 1.20 1.69 -0.686 -0.711 -0.283 -1.03 -1.16 0.912 -0.250
4 -1.37 -0.591 -0.0408 -0.0560 -0.0152 -2.01 0.164 0.912 -0.250
5 0.0760 -0.591 -0.0408 -0.908 -0.687 -1.03 -0.151 -1.10 -0.250
6 1.20 -0.591 -0.0408 -0.0560 -0.0152 -2.01 0.321 0.912 -0.250</code></pre>
</div>
</div>
</section>
<section id="fit-models" class="slide level2">
<h2>Fit Models</h2>
<ul>
<li class="fragment">Linear Regression</li>
<li class="fragment">Light GBM</li>
<li class="fragment">XGBoost</li>
<li class="fragment">Neural Network</li>
</ul>
</section>
<section id="linear-regression" class="slide level2">
<h2>Linear Regression</h2>
<div class="quarto-layout-panel">
<div class="quarto-layout-row quarto-layout-valign-top">
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output cell-output-stdout">
<pre><code># A tibble: 3 × 2
.metric mean
<chr> <dbl>
1 mae 4099.
2 rmse 10758.
3 rsq 0.649</code></pre>
</div>
</div>
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output-display">
<p><img data-src="542_Presentation_files/figure-revealjs/lgb-cal-plot-1.png" style="width:90.0%"></p>
</div>
</div>
</div>
</div>
<!-- ## Visualize Where We Let LightGBM Search -->
<!-- ```{r,out.width="100%",fig.align='center',out.height="100%",echo=FALSE} -->
<!-- plot_ly(grid, x = ~trees, y = ~log10(learn_rate), z = ~min_n) %>% -->
<!-- add_markers(color = ~trees) %>% -->
<!-- layout(scene = list(xaxis = list(title = "Trees"), -->
<!-- yaxis = list(title = "Learn Rate"), -->
<!-- zaxis = list(title = "Min N"))) -->
<!-- ``` -->
</section>
<section id="light-gbm" class="slide level2">
<h2>Light GBM</h2>
<div class="quarto-layout-panel">
<div class="quarto-layout-row quarto-layout-valign-top">
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output cell-output-stdout">
<pre><code># A tibble: 1 × 2
.metric mean
<chr> <dbl>
1 rmse 4285.</code></pre>
</div>
</div>
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output-display">
<p><img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-17-1.png" style="width:90.0%"></p>
</div>
</div>
</div>
</div>
</section>
<section id="racing-lightgbm" class="slide level2">
<h2>🏎 Racing LightGBM</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-18-1.png" width="960" class="r-stretch"></section>
<section id="racing-lightgbm-best-model" class="slide level2">
<h2>🏎 Racing LightGBM Best Model️</h2>
<div class="quarto-layout-panel">
<div class="quarto-layout-row quarto-layout-valign-top">
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output cell-output-stdout">
<pre><code># A tibble: 1 × 2
.metric mean
<chr> <dbl>
1 rmse 4382.</code></pre>
</div>
</div>
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output-display">
<p><img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-20-1.png" style="width:90.0%"></p>
</div>
</div>
</div>
</div>
</section>
<section id="lightgbm-testing-results" class="slide level2">
<h2>LightGBM Testing Results</h2>
<div class="quarto-layout-panel">
<div class="quarto-layout-row quarto-layout-valign-top">
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output cell-output-stdout">
<pre><code># A tibble: 3 × 2
.metric .estimate
<chr> <dbl>
1 rmse 3086.
2 mae 1130.
3 rsq 0.967</code></pre>
</div>
</div>
<div class="cell quarto-layout-cell" style="flex-basis: 50.0%;justify-content: center;">
<div class="cell-output-display">
<p><img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-22-1.png" style="width:90.0%"></p>
</div>
</div>
</div>
</div>
</section>
<section id="xgboost" class="slide level2">
<h2>🏎️ XGBoost</h2>
<img data-src="542_Presentation_files/figure-revealjs/unnamed-chunk-23-1.png" width="960" class="r-stretch"></section>
<section id="xgboost-best-model" class="slide level2">
<h2>🏎️ XGBoost Best Model</h2>
<div class="cell">
<div class="cell-output cell-output-stdout">
<pre><code># A tibble: 3 × 4
.metric .estimator .estimate .config
<chr> <chr> <dbl> <chr>
1 rmse standard 3116. Preprocessor1_Model1
2 mae standard 1030. Preprocessor1_Model1
3 rsq standard 0.966 Preprocessor1_Model1</code></pre>
</div>
</div>
</section>
<section id="model-recap" class="slide level2">
<h2>Model Recap</h2>
<ul>
<li class="fragment">Racing didn’t make much difference</li>
<li class="fragment">LightGBM and XGBoost performed similarly</li>
<li class="fragment">LightGBM was faster to train</li>
<li class="fragment">LightGBM was faster to predict</li>
<li class="fragment">LightGBM was more interpretable</li>
</ul>
</section>
<section id="lets-dive-into-the-lightgbm-model" class="slide level2">
<h2>Lets Dive into the LightGBM Model</h2>
<img src="https://play-lh.googleusercontent.com/Q_3vIq94Bs2_QYFiFw4vQhobVioxzaKEq-XDuW0OEugD--iGQNLYktO2PgEcAED53v0" class="slide-logo r-stretch"><div class="footer footer-default">
</div>
</section></section>
</div>
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