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<!DOCTYPE html>
<html lang="en">
<head>
<script src="./assets/js/color-modes.js"></script>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="description" content="" />
<meta
name="author"
content="Mark Otto, Jacob Thornton, and Bootstrap contributors"
/>
<meta name="generator" content="Hugo 0.118.2" />
<title>Marcella Harris · DataPortfolio</title>
<link
rel="canonical"
href="https://getbootstrap.com/docs/5.3/examples/blog/"
/>
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/@docsearch/css@3"
/>
<link href="./assets/css/bootstrap.min.css" rel="stylesheet" />
<!-- Favicons -->
<link
rel="apple-touch-icon"
href="./assets/img/favicons/apple-touch-icon.png"
sizes="180x180"
/>
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rel="icon"
href="./assets/img/favicons/favicon-32x32.png"
sizes="32x32"
type="image/png"
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href="./assets/img/favicons/safari-pinned-tab.svg"
color="#712cf9"
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<link rel="icon" href="./assets/img/favicons/favicon.ico" />
<meta name="theme-color" content="#712cf9" />
<style>
.bd-placeholder-img {
font-size: 1.125rem;
text-anchor: middle;
-webkit-user-select: none;
-moz-user-select: none;
user-select: none;
}
@media (min-width: 768px) {
.bd-placeholder-img-lg {
font-size: 3.5rem;
}
}
.b-example-divider {
width: 100%;
height: 3rem;
background-color: rgba(0, 0, 0, 0.1);
border: solid rgba(0, 0, 0, 0.15);
border-width: 1px 0;
box-shadow: inset 0 0.5em 1.5em rgba(0, 0, 0, 0.1),
inset 0 0.125em 0.5em rgba(0, 0, 0, 0.15);
}
.b-example-vr {
flex-shrink: 0;
width: 1.5rem;
height: 100vh;
}
.bi {
vertical-align: -0.125em;
fill: currentColor;
}
.nav-scroller {
position: relative;
z-index: 2;
height: 2.75rem;
overflow-y: hidden;
}
.nav-scroller .nav {
display: flex;
flex-wrap: nowrap;
padding-bottom: 1rem;
margin-top: -1px;
overflow-x: auto;
text-align: center;
white-space: nowrap;
-webkit-overflow-scrolling: touch;
}
.btn-bd-primary {
--bd-violet-bg: #712cf9;
--bd-violet-rgb: 112.520718, 44.062154, 249.437846;
--bs-btn-font-weight: 600;
--bs-btn-color: var(--bs-white);
--bs-btn-bg: var(--bd-violet-bg);
--bs-btn-border-color: var(--bd-violet-bg);
--bs-btn-hover-color: var(--bs-white);
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--bs-btn-active-bg: #5a23c8;
--bs-btn-active-border-color: #5a23c8;
}
.bd-mode-toggle {
z-index: 1500;
}
.bd-mode-toggle .dropdown-menu .active .bi {
display: block !important;
}
</style>
<!-- Custom styles for this template -->
<link
href="https://fonts.googleapis.com/css?family=Playfair+Display:700,900&display=swap"
rel="stylesheet"
/>
<!-- Custom styles for this template -->
<link href="./assets/css/blog.css" rel="stylesheet" />
</head>
<body>
<!--Bootstrap colomode and interactive settings begin-->
<svg xmlns="http://www.w3.org/2000/svg" class="d-none">
<symbol id="check2" viewBox="0 0 16 16">
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<div
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>
<button
class="btn btn-bd-primary py-2 dropdown-toggle d-flex align-items-center"
id="bd-theme"
type="button"
aria-expanded="false"
data-bs-toggle="dropdown"
aria-label="Toggle theme (dark)"
>
<svg class="bi my-1 theme-icon-active" width="1em" height="1em">
<use href="#moon-stars-fill"></use>
</svg>
<span class="visually-hidden" id="bd-theme-text">Toggle theme</span>
</button>
<ul
class="dropdown-menu dropdown-menu-end shadow"
aria-labelledby="bd-theme-text"
>
<li>
<button
type="button"
class="dropdown-item d-flex align-items-center"
data-bs-theme-value="light"
aria-pressed="false"
>
<svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em">
<use href="#sun-fill"></use>
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Light
<svg class="bi ms-auto d-none" width="1em" height="1em">
<use href="#check2"></use>
</svg>
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</li>
<li>
<button
type="button"
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<svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em">
<use href="#moon-stars-fill"></use>
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Dark
<svg class="bi ms-auto d-none" width="1em" height="1em">
<use href="#check2"></use>
</svg>
</button>
</li>
<li>
<button
type="button"
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data-bs-theme-value="auto"
aria-pressed="false"
>
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<use href="#circle-half"></use>
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Auto
<svg class="bi ms-auto d-none" width="1em" height="1em">
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fill-rule="evenodd"
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</symbol>
</svg>
<!--Bootstrap colomode and interactive settings end-->
<div class="container">
<!--Header text logo begin-->
<header class="border-bottom lh-1 py-3">
<div class="row flex-nowrap justify-content-center align-items-center">
<div class="col-4 text-center">
<a
class="blog-header-logo text-body-emphasis text-decoration-none"
href="#"
>Marcella Harris</a
>
</div>
</div>
</header>
<!--Header text logo end-->
<!--Navlink texts begin-->
<div class="nav-scroller py-1 mb-3 border-bottom">
<nav class="nav nav-underline justify-content-between">
<a
class="nav-item nav-link link-body-emphasis active"
href="https://marcellaharr.github.io"
style="color: #FFFFC0 !important;"
>Home</a
>
<a
class="nav-item nav-link link-body-emphasis"
href="https://github.com/MarcellaHarr"
target="_blank"
>GitHub Profile</a
>
<a class="nav-item nav-link link-body-emphasis" href="./r-studio.html"
>R-Studio repo</a
>
<a class="nav-item nav-link link-body-emphasis" href="./excel.html"
>Excel repo</a
>
<a class="nav-item nav-link link-body-emphasis" href="./web-dev.html"
>Web Dev repo</a
>
<a class="nav-item nav-link link-body-emphasis" href="./sql-repo.html"
>SQL repo</a
>
<a class="nav-item nav-link link-body-emphasis" href="./jupyter.html"
>Jupyter repo</a
>
<a class="nav-item nav-link link-body-emphasis" href="#"
>Education repo</a
>
<a
class="nav-item nav-link link-body-emphasis"
href="./follow-along.html"
>Follow-Along repo</a
>
</nav>
</div>
<!--Navlink texts end-->
</div>
<main class="container">
<!--Banner begin-->
<div class="p-4 p-md-5 mb-4 rounded text-body-emphasis bg-body-secondary">
<div class="col-lg-6 px-0">
<h1 class="display-4 fst-italic">
Greetings and salutations to you all!
</h1>
<p class="lead my-3">
Step into the captivating world of data wizardry! Whether you're a
tech enthusiast or a seasoned pro, join me on a journey where
analytics meets artistry, unlocking the magic of insights and
stories woven from the threads of data.
</p>
</div>
</div>
<!--Banner end-->
<!--Cards begin-->
<div class="row mb-2">
<div class="col-md-6">
<div
class="row g-0 border rounded overflow-hidden flex-md-row mb-4 shadow-sm h-md-250 position-relative"
>
<div class="col p-4 d-flex flex-column position-static">
<strong class="d-inline-block mb-2 text-primary-emphasis"
>Currently Working On...</strong
>
<h3 class="mb-0">Favorita Store Sales</h3>
<div class="mb-1 text-body-secondary"><hr /></div>
<p class="card-text mb-auto">
Insights and time-series forcasting on major supermarket
corporations based in South America.
</p>
<a
href="https://github.com/MarcellaHarr/favorita-store-sales/tree/a3f7b0de726eb2d15f00f824d07409c58b3da6bf"
target="_blank"
class="icon-link gap-1 icon-link-hover stretched-link"
style="color: #777 !important; text-decoration:underline !important;"
>
Continue reading
<svg class="bi"><use xlink:href="#chevron-right"></use></svg>
</a>
</div>
<div class="col-auto d-none d-lg-block">
<div class="col-auto d-none d-lg-block">
<img
src="./assets/img/favorita-thumbnail.jpg"
alt="Your Image Alt Text"
width="200"
height="250"
class="bd-placeholder-img"
aria-label="Placeholder: Thumbnail"
/>
</div>
</div>
</div>
</div>
<div class="col-md-6">
<div
class="row g-0 border rounded overflow-hidden flex-md-row mb-4 shadow-sm h-md-250 position-relative"
>
<div class="col p-4 d-flex flex-column position-static">
<strong class="d-inline-block mb-2 text-success-emphasis"
><hr
/></strong>
<h3 class="mb-0">Sprightly Homeschool</h3>
<div class="mb-1 text-body-secondary">Nov 11</div>
<p class="mb-auto">
Built a fully functional website for my homeschooled daughter,
utilizing MySQL to store, organize, and run daily queries.
</p>
<a
href="https://marcellaharr.github.io/repos/sprightlyHomeschool.html"
target="_self"
class="icon-link gap-1 icon-link-hover stretched-link"
style="color: #777 !important; text-decoration:underline !important;"
>
Continue reading
<svg class="bi"><use xlink:href="#chevron-right"></use></svg>
</a>
</div>
<div class="col-auto d-none d-lg-block">
<div class="col-auto d-none d-lg-block">
<img
src="./assets/img/sprightly-thumbnail.jpg"
alt="Your Image Alt Text"
width="200"
height="250"
class="bd-placeholder-img"
aria-label="Placeholder: Thumbnail"
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<h3 class="pb-4 mb-4 fst-italic border-bottom">From the Firehose</h3>
<!--Article-1 begin-->
<article class="blog-post">
<h2 class="display-5 link-body-emphasis mb-1">
New York 2015 Trees
</h2>
<p class="blog-post-meta">
January 31, 2023 by <a href="#" style="color: #777 !important; text-decoration: none;">Marcella</a>
</p>
<h2>Analysis</h2>
<p>
<div style="max-width: 848px; margin: auto;">
<img src="./assets/img/ny-street-trees/Stump_Diameter_Distribution_without_Binwidth_and_Filtered_1.png" style="width: 100%;" />
</div>
</p>
<p>
My analysis provides key insights into the condition and
management of street trees in the area. Firstly, tree diameters
are primarily concentrated between 50 and 60 inches, with a
notable number of outliers that may stem from human error or
environmental impacts. This suggests potential issues with data
collection or external factors influencing tree growth
</p>
<p>
<div style="max-width: 848px; margin: auto;">
<img src="./assets/img/ny-street-trees/Tree_and_Stump_Overview_Plot_two2.png" style="width: 100%;" />
</div>
</p>
<p>
<div style="max-width: 848px; margin: auto;">
<img src="./assets/img/ny-street-trees/Tree_Diameter_Distribution_without_Binwidth_and_Filtered_2.png" style="width: 100%;" />
</div>
</p>
<p>
Secondly, the mean diameter at breast height for street trees is
11.28 inches, with a median of 9 inches, indicating a wide range
of tree sizes. The large standard deviation of 20 further
emphasizes variability in tree size across New York City.
Additionally, the median tree diameter of 12 inches is notably
higher than the median stump diameter of 3 inches, indicating that
the city's trees are generally larger and older than their stumps.
</p>
<p>
<div style="max-width: 848px; margin: auto;">
<img src="./assets/img/ny-street-trees/Tree-Stump_Problems_3.png" style="width: 100%;" />
</div>
</p>
<p>
Thirdly, survey responses reveal that the majority of surveyors
reported 0-2 problems with street trees, with greater variance in
responses reporting higher numbers of problems. This suggests
potential issues with tree roots affecting their health and
vitality.
</p>
<p>
<div style="max-width: 848px; margin: auto;">
<img src="./assets/img/ny-street-trees/Alive_Tree_Diameter_By_Health-Status_Conditions_four4.png" style="width: 100%;" />
</div>
</p>
<p>
<div style="max-width: 848px; margin: auto;">
<img src="./assets/img/ny-street-trees/Stump_Diameter_By_Health-Status_Conditions_4.png" style="width: 100%;" />
</div>
</p>
<p>
Fourthly, although the majority of trees in the city are in good
health and labeled as "Alive," there is a need for improvement in
the management and care of trees in "Fair" and "Poor" condition.
The data suggests potential root issues in these trees that need
addressing to ensure their survival and long-term health.
</p>
<p>
<div style="max-width: 848px; margin: auto;">
<img src="./assets/img/ny-street-trees/Species_Scientific_Names_By_Conditions_finally_5.png" style="width: 100%;" />
</div>
</p>
<p>
Finally, diameters in the "Not Applicable" category are more
tightly clustered than in the "Stump" category, indicating
potential consistency in this area of data collection. However,
bins with maximum outliers suggest possible data errors or other
issues requiring attention.
</p>
<p>
Overall, this data analysis provides valuable insights into the
condition of street trees in the city, highlighting areas that may
need additional attention and resources to ensure the health and
vitality of these important urban assets.
</p>
<h3>Conclusion</h3>
<p>
The comprehensive street tree census conducted by NYC Parks &
Recreation and partner organizations in 2015 offers crucial
insights into the state of street trees in New York City. Although
the majority of street trees are healthy, the findings underscore
the need to improve and maintain trees in "Fair" and "Poor"
condition. The data analysis also highlights potential root issues
and variations in tree diameter measurements compared to stump
diameter measurements. Further research can be conducted to
investigate the underlying causes of these discrepancies and to
establish effective strategies for managing and caring for street
trees in the New York City area.
</p>
<hr />
</article>
<!--Article-1 end-->
<!--Article-2 begin-->
<article class="blog-post">
<h2 class="display-5 link-body-emphasis mb-1">Nashville Housing Cleaning</h2>
<p class="blog-post-meta">
June 21, 2022 by <a href="#" style="color: #777 !important; text-decoration: none;">Marcella</a>
</p>
<p>
Within this comprehensive initiative, a series of carefully designed SQL
queries were executed in SQL Server Management Studio 2018, representing
a pivotal step in optimizing a dataset for enhanced performance. The dataset,
sourced from AlexTheAnalyst on GitHub as part of the Data Analyst Portfolio
Project, was downloaded onto an external thumb drive and systematically
organized into folders. It consists of 19 columns and an impressive 56,477
rows, excluding the header. Key columns include UniqueID, ParcelID, and SaleDate.
</p>
<p>
<table class="table">
<thead>
<tr>
<th>ParcelID</th>
<th>PropertyAddress</th>
<th>ParcelID (nash2)</th>
<th>PropertyAddress (nash2)</th>
<th>MergedPropertyAddress</th>
</tr>
</thead>
<tbody>
<tr>
<td>001</td>
<td>123 Main St</td>
<td>001</td>
<td></td>
<td>123 Main St</td>
</tr>
<tr>
<td>002</td>
<td></td>
<td>002</td>
<td>456 Oak St</td>
<td>456 Oak St</td>
</tr>
<tr>
<td>003</td>
<td></td>
<td>003</td>
<td>789 Pine St</td>
<td>789 Pine St</td>
</tr>
<tr>
<td>004</td>
<td>876 Maple St</td>
<td>004</td>
<td></td>
<td>876 Maple St</td>
</tr>
<tr>
<td>005</td>
<td>543 Elm St</td>
<td>005</td>
<td></td>
<td>543 Elm St</td>
</tr>
</tbody>
</table>
</p>
<p>
Upon the initial examination in Microsoft Excel, the dataset displayed 18 columns
with a "General" data type, and one column was formatted as "Date (April 9, 2013)."
Notably, all general columns were in uppercase, and the month names in the date column
were presented in title case. A closer scrutiny of the SoldAsVacant column revealed
responses such as No, N, Yes, and Y. Interestingly, several columns, including OwnerName,
OwnerAddress, Acreage, TaxDistrict, LandValue, BuildingValue, TotalValue, YearBuilt,
Bedrooms, FullBath, and HalfBath, contained a noteworthy number of null values.
</p>
<p>
<table class="table">
<thead>
<tr>
<th>UniqueID</th>
<th>ParcelID</th>
<th>PropertyAddress</th>
<th>SalePrice</th>
<th>SaleDate</th>
<th>LegalReference</th>
<th>RowNum</th>
</tr>
</thead>
<tbody>
<tr>
<td>001</td>
<td>123456</td>
<td>789 Main St</td>
<td>250,000</td>
<td>2023-01-15</td>
<td>ABC123</td>
<td>2</td>
</tr>
<tr>
<td>002</td>
<td>789012</td>
<td>456 Oak St</td>
<td>300,000</td>
<td>2023-02-20</td>
<td>XYZ789</td>
<td>2</td>
</tr>
<tr>
<td>003</td>
<td>345678</td>
<td>123 Pine St</td>
<td>200,000</td>
<td>2023-03-10</td>
<td>LMN456</td>
<td>3</td>
</tr>
<tr>
<td>004</td>
<td>901234</td>
<td>876 Maple St</td>
<td>400,000</td>
<td>2023-04-05</td>
<td>PQR789</td>
<td>2</td>
</tr>
<tr>
<td>005</td>
<td>567890</td>
<td>543 Elm St</td>
<td>150,000</td>
<td>2023-05-12</td>
<td>STU012</td>
<td>3</td>
</tr>
</tbody>
</table>
</p>
<p>
During the transition to SQL Server, despite the absence of initial documentation on
data types, null counts, or distinct value counts, the queries were adeptly organized
into multiple files, categorized based on specific tasks. Following the cleansing process,
the dataset retained 21 columns while maintaining its original 56,477 rows. A total of 26
meticulously crafted query statements were utilized in this endeavor, underscoring the
analytical acumen and dedication invested in the project.
</p>
<hr />
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<h4 class="fst-italic">About</h4>
<p class="mb-0">
Hi, I'm Marcella, a junior data analyst in progress since May
2021. I'm passionate about Python, SQL, and R, aiming to unlock
insights and help others. I love tackling challenges, finding
unique solutions, and using data to tell compelling stories.
Actively learning and collaborating, I'm confident that with
dedication, I'll become a proficient data analyst.
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Google Cyclistic Casestudy | Final Project
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