R coding for data analysts - from beginner to advanced

Porcu Valentina

Sinopsis

This book on coding with R for aspiring data analysts is designed to be a guide in this programming language from the basics. By the end of this book, you will be able to create, import, manipulate and manage datasets. We will learn together how to download, install and use some of the most important tools and libraries for using R. We will then move on to the creation of objects: R is based on certain structures that you need to know, such as vectors, matrices, lists and dataframes. Once we understand how to create and manipulate these data structures, extract elements from them and save them locally on the computer, we will move on to the use of loops and the creation of functions.

We will look at a number of useful topics: how to set up a working directory, how to install and retrieve a package, how to get information about data, where to find datasets for testing, and how to get help with a function. When analysing data, we need to understand the concept of dataset or dataframe. We will therefore see how to import a dataframe from your computer, or from the internet, into R. There are many functions that are suitable for this purpose, and many packages that are useful for importing data that is in some particular format, such as the formats for Excel, .csv, .txt or JSON. We will then see how to manipulate data, create new variables, aggregate data, sort them horizontally and longitudinally, and how to merge two datasets. To do this, we will use some specific packages and functions, such as dplyr, tidyr or reshape2. We will also briefly see how to interface with a database and use other packages to streamline the management of somewhat larger datasets.

R is also a very important language in the field of statistics. We will therefore learn some of the basic functions, such as calculating averages per row or per column, and the most common statistical functions in the field of descriptive statistics. When it comes to data analysis, we will often find ourselves creating graphs to explain our data and analyses. For this reason, we devote part of the book to seeing how to create graphs with both the functions of the basic library and the ggplot2 package. In the final sections, we will see how to create and export reports and slides, summarise the topics we have seen and the functions we have used, and look at the supporting material.

Disponible desde: 10/08/2023.

Ciencia y tecnología

Otros libros que te pueden interesar

The Alien Perspective - A New...

David Whitehouse

A journey through the evolving cosmos, considering how human survival will depend on otherworldly perspectives. 
 
In David Whitehouse's most ambitious book to date he explores how human evolution has been intertwined with the workings of the cosmos from the very beginning, and what the far-distant future may hold, both for the universe and for ourselves. 
 
Given enough time, Whitehouse contends, we must communicate with intelligent aliens whose divergent perspective will transform our understanding of the universe. First contact may even come sooner than we think. We have already transmitted signals towards promising exoplanets. If, say, Gliese 581d harbours life, the return signal could reach us in 2051. 
 
Drawing the thread of human consciousness from the cave to the cosmos, the acclaimed author of Apollo 11: The Inside Story charts our future journey to the end of space and time, and considers whether something of humanity could remain at the end of it all.

Ver libro

Black Space - Unveiling the...

Dirk Fallon

This book takes readers deep into the unseen heart of the cosmos, where light vanishes and gravity reigns supreme. In Black Holes and Beyond, explore the staggering power of these cosmic giants—from their formation in stellar collapse to their role in galaxy evolution. Discover the science behind the event horizon and the eerie concept of the singularity, where known physics breaks down. 
Dark Space Dynamics moves beyond the observable universe, diving into the mechanics of the dark forces shaping cosmic structure. What drives galaxies to move apart at increasing speeds? How do invisible phenomena like dark energy and matter influence everything we see? This section uncovers the silent engine of the universe’s ongoing transformation. 
In Dark Space Enigmas, journey through the frontiers of modern theoretical physics, from wormholes and time warps to the possible existence of hidden dimensions. Through scientific discoveries and unanswered questions, this collection reveals how much of reality lies just out of reach—beckoning us to explore the shadows that define our universe.

Ver libro

The Indianapolis - The Worst...

Nova Ashford

The USS Indianapolis was a Portland-class heavy cruiser of the United States Navy, commissioned in 1932, and it played a vital role in the Pacific theater during World War II. Its most significant and tragic moment came in 1945, during its final mission. The ship was tasked with delivering critical components for the atomic bomb that would later be dropped on Hiroshima, Japan. This mission, which involved transporting the bomb's uranium core to the island of Tinian, was classified, and few knew about the importance of the cargo aboard the ship. 
After successfully completing its mission and delivering the components to Tinian on July 26, 1945, the Indianapolis set sail for the Philippines, where it would rendezvous with other ships in the Pacific fleet. The ship’s captain, Charles B. McVay III, had orders to take the cruiser directly to its next destination, avoiding the traditional convoy routes to reduce the risk of submarine attack. With the war nearing its end and Japan’s defeat imminent, the ship's journey seemed routine, and there was little concern about the potential dangers ahead. The USS Indianapolis was an experienced and battle-tested ship, having served in key naval engagements throughout the war, including the Battle of Leyte Gulf and the Battle of the Philippine Sea. 
However, the absence of a convoy left the Indianapolis vulnerable. On the night of July 29, 1945, while traveling through the Philippine Sea, the ship was struck by two torpedoes fired by the Japanese submarine I-58. The attack tore through the hull, causing devastating damage. Within minutes, the ship began to sink, and the crew was thrown into chaos. Many of the crew members perished instantly, while others scrambled into the water, trying to escape the fiery wreckage of the ship. The survivors faced an unimaginable nightmare as they found themselves stranded in the open ocean, with little hope of immediate rescue.

Ver libro

Dr Sonia's Guide to Navigating...

MD Sonia Bahlani

The key to feeling good "down there" is understanding causes and solutions—there is relief from pelvic pain. 
 
 
 
One in fifteen people report experiencing chronic pelvic pain, while many more suffer in silence. It's time to put aside the stigmatization and misdiagnosis! Dr. Sonia Bahlani has helped thousands of patients reclaim their lives at her New York City practice. With dual expertise in the fields of gynecology and urology—sought purposefully because she was interested in helping patients with pelvic pain—Bahlani is the doctor to address this common yet often-untreated condition. 
 
 
 
In this book, Bahlani helps readers in multiple ways: she provides detailed information on what might be causing pain—from endometriosis to fibroids to prostate inflammation—through descriptions, questions, and case studies; and she reviews treatments, from what readers can expect in a doctor's office to what they can do at home. Her sympathetic bedside manner and extensive knowledge will help empower readers and give them renewed control over their own bodies.

Ver libro

Neural Networks for Beginners -...

Steve Abrams

Neural Networks for Beginners: A Journey Through the Brain of AI is the essential guide for anyone looking to understand the complex world of neural networks and artificial intelligence from the ground up. Tailored specifically for beginners, this book simplifies sophisticated concepts and technical jargon into clear, comprehensible language, accompanied by practical examples and hands-on projects.
Starting with a foundational overview of artificial intelligence and machine learning, the book delves into the architecture of neural networks, explaining the roles of neurons, layers, activation functions, and key methodologies like backpropagation and gradient descent. Each concept is broken down meticulously, ensuring readers not only learn what these terms mean but also how they fit into the larger picture of AI development.
As readers progress, they are guided through more advanced topics such as convolutional neural networks (CNNs) for image processing, recurrent neural networks (RNNs) for sequential data, and even cutting-edge fields like unsupervised learning and reinforcement learning. Each chapter is designed to build upon the knowledge gained in the previous ones, gradually increasing in complexity and culminating in a comprehensive understanding of the subject.
Neural Networks for Beginners: A Journey Through the Brain of AI offers a thorough and engaging introduction to a field that is shaping the future. Get ready to embark on a journey of learning and discovery that will empower you with the knowledge to participate in the AI revolution.

Ver libro

A Guide to Understanding Your...

Christina Holmbaeck

Are you ready to transform your horse's behavior and build a stronger, more trusting bond? "A Guide to Understand Your Horse’s Personality" is your ultimate guide to understanding and training every equine personality type, ensuring that both you and your horse thrive in your training journey.
Personalized training: Discover tailored techniques for engaging and training challenging, hesitant, fearful, and reserved horses.
Build trust and communication: Learn how to create a safe, supportive environment and master consistent, positive interaction.
Overcome common challenges: Find solutions to common training issues, and ensure steady progress with your horse.
Enhance your skills: Improve your training methods and develop a better understanding of your horse's unique needs.
Get practical tools that work: Each of the four horse types is supported by clear, practical exercises designed to match their specific needs. Whether your horse lacks confidence, has too much energy, or is hesitant to engage, you'll find step-by-step guidance to help you create a positive training experience.
Do you feel overwhelmed by your horse's challenging behavior? This book provides clear, step-by-step instructions and practical strategies that can help any horse owner – regardless of experience level – to achieve remarkable improvements. Whether your horse is reserved, hesitant or overly energetic, you'll find the guidance you need to succeed.
If you want to enhance your horse's training experience and build a more harmonious relationship – this book is for you.

Ver libro