R coding for data analysts - from beginner to advanced

Porcu Valentina

Sinossi

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.

Disponibile da: 10/08/2023.

Scienze e tecnologia

Altri libri che potrebbero interessarti

Studies In Consciousness - and...

Sharon Ann Meyer

This is part of the “Lightworker's Log Book Series” that came into existence in 2008, via soul promptings and after a series of life circumstances designed to awaken the author to humanity's true state. Previous publications consisted of choosing titles, arranging content, and taking vast amounts of time to compile an entire book. These days, books are easily birthed by merely tapping into greater aspects of what may be referred to as the author’s ever-changing consciousness. Publications are now compiled in this way by many more authors than ever before. This book is just one example of material stemming from what may be referred to as a more evolved consciousness experiencing and expressing in a field of decreasing duality. 
As segments of humanity become increasingly chaotic while others experience greater states of consciousness, there comes a time when one asks, “Are we there yet?” STUDIES IN CONSCIOUSNESS and The Breath Of One is designed to explain in, hopefully, easily understood terms the vast separation from Source that humanity chose to experience. It is not meant to create further separations of Consciousness by delving into and examining other planets, galaxies or universes, but to explain how humanity got to the point where it is in the later portion of the twenty-first century, and how it will rise above it. STUDIES IN CONSCIOUSNESS and The Breath Of One began to surface during weeks of daily, multiple deluges of water in September 2025. 
“Water is the wilderness, the calling, the rally of the soul.” 
This book contains what the author refers to as “heavy-duty information,” and as does water contains light codes, which necessitate short bursts of reading material to be assimilated chapter by chapter, allowing time between them for full incorporation. 
The return to Source may not seem instantaneous, but it is already achieved, for separation is impossible in the grand scheme of Source. 
Read this book to see that it rings true and speaks for itself.

Mostra libro

Receive Your Healing

Gabriel

This book is about how to receive divine healing. Can God still heal? Yes! Can we live in good and perfect health today? Yes! Our God is the same yesterday, today and forevermore. Expect your healing as you read. Here, you will read some incredible testimonies that will instantly increase your faith in God and His unlimited ability and wiliness to intervene even in worst situations. For example, God still cures incurable and terminal diseases. He still raises the dead. Have you read about a man who was raised from death after staying two days in the mortuary? Now, if God can do that, why do you think nothing can be done about that your condition? There are many other incredible testimonies here. There are ten powerful, illuminating chapters in this book: All Things are Possible, Healing is Your Right, Origin of Sickness, Word of God, Name of Jesus, Holy Spirit, Power of Faith, Retaining Your Healing. You will also learn about the roles of prayer, anointing oil, laying of hands, compassion (love), obedience, angels, praise and worship, etc, in our quest to receive and retain our healing. This book is designed for you to receive your healing as you go through it, and it’s very practical.

Mostra libro

Data Analysis - Data Quality...

Bright Mills

Data Analysis is a critical process in both academic and professional environments that involves inspecting, cleansing, transforming, and modeling data to discover useful information, derive conclusions, and support decision-making. It is foundational to nearly every field, from business and healthcare to engineering and social sciences. The ultimate aim of data analysis is to extract actionable insights from raw data, turning numbers and records into knowledge that can guide strategies and policy. This paper provides an in-depth exploration of data analysis, covering both theoretical underpinnings and practical applications. It begins by defining what data analysis is and discussing its historical evolution. It delves into different types of data (quantitative, qualitative, structured, unstructured) and explains the steps in the data analysis lifecycle: from data collection and preparation to interpretation and reporting. The paper further categorizes types of data analysis (descriptive, diagnostic, predictive, and prescriptive) and explains key techniques used in each. Statistical methods, data visualization, machine learning, and data mining approaches are thoroughly examined. Tools such as Excel, Python, R, and SQL are discussed in the context of their suitability for various analysis tasks. Ethical considerations, data quality challenges, and real-world applications in industries like healthcare, marketing, finance, and public policy are also addressed. Finally, the paper concludes by highlighting emerging trends in data analysis, such as automated analytics and AI-driven insights. This document serves as a comprehensive guide for students, researchers, professionals, and anyone interested in the field of data analysis, equipping readers with both conceptual knowledge and practical strategies to approach complex data-driven problems.

Mostra libro

Inside Out

Pat Toulson

Similar to Jenny Worth’s Call the Midwife, this book reveals a different, still hidden medical field, the world of x-rays. This story follows a shy, sixteen year old girl, as she attempts to become a professional radiographer from 1962 into the 1990’s. All the incidents and cases are true, for they are Patricia Toulson’s real-life memories. She is thrust into the harsh disciplinary world of a general hospital, ruled by barbed tongues of nursing Sisters’ and ridiculed and harassed by experienced male staff. She experiences horror and tragedy, sadness and joy but also humour abounds in unexpected places. She encounters child abuse, infertility and teenage terminal illness, countered by the wonders of the healing body and the splendour and radiance of pregnancy.

Mostra libro

Dinosaurs Dragons and the Bible

Bodie Hodge

Dinosaurs, Dragons, and the Bible is a one-of-a kind Christian apologetic resource sure to captivate families, scientists, historians, and theologians! Using the Bible as the absolute authority, Bodie Hodge of Answers in Genesis, the Creation Museum, and the Ark Encounter, provides answers to the most asked questions about these amazing creatures. 
 
As Christians, we must not ignore what the Scriptures say about dinosaurs and dragons and accept the secular world’s wisdom. This #ProBible handbook offers fascinating answers based on fossil footprints, soft tissue, biblical references to dragons, serpents, and leviathans, and much more. 
 
Go beyond the Hollywood version of these magnificent creatures to discover the truth of these icons of Creation and testaments of God’s power in the Genesis Flood. Designed for almost all ages, the book answers questions such as: 
How Did Huge Dinosaurs Fit on the Ark?Are Dinosaurs and Dragons the Same Thing?How Do I Use the Bible as the Framework to Look at Dinosaurs?Were Dinosaurs on Noah’s Ark (and Did Any Go Extinct Before the Flood)?Are Dinosaur Fossils in the Cretaceous, Jurassic, and Triassic Rock Millions of Years Old or from the Flood?Why Don’t We Find the Word “Dinosaur” in the Bible?Are There Any Human and Dinosaur Fossils Buried Together? 
 
Dinosaurs are nearly synonymous with evolution in the minds of much of the world. Studying these answers will help Christian families, church leaders, scientists, and theologians develop greater faith in the infallibility of God’s Word and His role as Creator.

Mostra libro

Apology for Sadness An

Anne Lynch Botta

LibriVox volunteers bring you 10 recordings of An Apology for Sadness by Anne Lynch Botta. This was the Weekly Poetry project for March 13, 2011.Anne Charlotte Lynch Botta was an American poet, writer, teacher and socialite whose home was the central gathering place of the literary elite of her era.At Mrs. Botta's receptions every Saturday night, attendees would find the most well-known writers, actors and artists, such as Poe, Margaret Fuller, Ralph Waldo Emerson, Bronson Alcott, Louisa May Alcott, Horace Greeley, Richard Henry Stoddard, Andrew Carnegie, Mary Mapes Dodge, Julia Ward Howe, Charles Butler, Fitz-Greene Halleck, Delia Bacon, Grace Greenwood, Bayard Taylor, William Cullen Bryant, Helen Hunt Jackson, actress Fanny Kemble, Daniel Webster, and many more. Her friend Kate Sanborn started her literary lecturing career at these receptions. Said a Boston writer: "It was not so much what Mrs. Botta did for literature with her own pen, as what she helped others to do, that will make her name a part of the literary history of the country." (summary from Wikipedia)

Mostra libro