The Book of R is a comprehensive, beginner-friendly guide to R, the world’s most popular programming language for statistical analysis. Even if you have no programming experience and little more than a grounding in the basics of mathematics, you’ll find everything you need to begin using R effectively for statistical analysis. You’ll start with the basics, like how to handle data and write simple programs, before moving on to more advanced topics, like producing statistical summaries of your data and performing statistical tests and modeling. You’ll even learn how to create impressive data visualizations with R’s basic graphics tools and contributed packages, like ggplot2 and ggvis, as well as interactive 3D visualizations using the rgl package. Dozens of hands-on exercises (with downloadable solutions) take you from theory to practice, as you learn: –The fundamentals of programming in R, including how to write data frames, create functions, and use variables, statements, and loops –Statistical concepts like exploratory data analysis, probabilities, hypothesis tests, and regression modeling, and how to execute them in R –How to access R’s thousands of functions, libraries, and data sets –How to draw valid and useful conclusions from your data –How to create publication-quality graphics of your results Combining detailed explanations with real-world examples and exercises, this book will provide you with a solid understanding of both statistics and the depth of R’s functionality. Make The Book of R your doorway into the growing world of data analysis.

This is the eBook of the printed book and may not include any media, website access codes, or print supplements that may come packaged with the bound book. Apple Pro Training Series: macOS Support Essentials 10.12 The Apple-Certified Way to Learn This is the official curriculum of the macOS Support Essentials 10.12 course and preparation for Apple Certified Support Professional (ACSP) 10.12 certification—as well as a top-notch primer for anyone who needs to support, troubleshoot, or optimize macOS Sierra. The only Apple-certified book on the market, this guide is designed for support technicians, help desk specialists, and ardent Mac users and takes you deep inside the macOS Sierra operating system. You’ll find in-depth, step-by-step instruction on everything from installing and configuring macOS Sierra to managing networks and system administration—all on your way to preparing for the industry-standard ACSP certification. Covers updated system utilities and new features of macOS Sierra, including Siri and Optimized Storage. Features authoritative explanations of underlying technologies, troubleshooting, system administration, and much more. Focused lessons take you step by step through practical, real-world tasks. Lesson files and bonus material available for download—including lesson review questions to help prepare you for the Apple certification exam. Web Edition provides full text of the book available online as part of our Content Update Program with revised content for significant software updates.

macOS Support Essentials 12, the official book for macOS support, is a top-notch primer for anyone who needs to support, troubleshoot, or optimize macOS Monterey, such as IT professionals, technicians, help desk specialists, and ardent Mac users. This is the only Apple Pro Training Series book that covers Monterey. You'll find in-depth, step-by-step instructions on everything from upgrading, updating, reinstalling and configuring macOS Monterey to setting-up network services. This book covers updated system utilities and new features in macOS Monterey: Passwords System Preference Live Text Voice Control User privacy settings Notarized apps Startup Security Utility And more! This book includes the following content: Authoritative explanations of underlying technologies, troubleshooting, system administration, and much more Focused lessons that take you step by step through practical, real-world tasks A Web Edition that provides the full text of the book online The Apple Pro Training Series is Apple's official self-paced learning resource. Books in this series offer downloadable lesson files and an online version of the book. Additional information on this and other books in this series can be found at www.peachpit.com/apple. For more on certification, visit training.apple.com.

The only Apple-certified book on OS X Lion, this revised best-seller will take you deep inside the latest big-cat operating system—covering everything from installation and configuration, customizing the operating system, supporting applications, setting up peripherals, and more. Whether you're a support technician or simply an ardent Mac user, you'll quickly learn and master the new features in OS X Lion. Following the learning objectives of the Apple Certified Support Professional exam, this self-paced book is a perfect guide for Apple’s training and a first-rate primer for computer support personnel who need to troubleshoot and optimize OS X Lion as part of their jobs. Chapter review sections and quizzes summarize and reinforce acquired knowledge. The Apple Pro Training Series serves as both a self-paced learning tool and the official curriculum for OS X Lion and OS X Lion Server certification programs.

The Apple-Certified Way to Learn macOS Support Essentials 11, the official book for macOS support, is a top-notch primer for anyone who needs to support, troubleshoot, or optimize macOS Big Sur, such as IT professionals, technicians, help desk specialists, and ardent Mac users. This is the only Apple Pro Training Series book that covers Big Sur. You'll find in-depth, step-by-step instructions on everything from upgrading, updating, reinstalling and configuring macOS Big Sur to setting-up network services like the Content Caching service. This book covers updated system utilities and new features in macOS Big Sur, including security and privacy enhancements, Control Center and Notification Center, Safari, system extensions, macOS Recovery, Startup Security Utility, and the Signed System Volume (SSV). This book includes the following content: Authoritative explanations of underlying technologies, troubleshooting, system administration, and much more Focused lessons that take you step by step through practical, real-world tasks A Web Edition that provides the full text of the book online The Apple Pro Training Series is Apple's official self-paced learning resource. Books in this series offer downloadable lesson files and an online version of the book. Additional information on this and other books in this series can be found at www.peachpit.com/apple. For more on certification, visit training.apple.com.

Test your knowledge and know what to expect on A+ exam day CompTIA A+ Complete Practice Tests, Second Edition enables you to hone your test-taking skills, focus on challenging areas, and be thoroughly prepared to ace the exam and earn your A+ certification. This essential component of your overall study plan presents nine unique practice tests—and two 90-question bonus tests—covering 100% of the objective domains for both the 220-1001 and 220-1002 exams. Comprehensive coverage of every essential exam topic ensures that you will know what to expect on exam day and maximize your chances for success. Over 1200 practice questions on topics including hardware, networking, mobile devices, operating systems and procedures, troubleshooting, and more, lets you assess your performance and gain the confidence you need to pass the exam with flying colors. This second edition has been fully updated to reflect the latest best practices and updated exam objectives you will see on the big day. A+ certification is a crucial step in your IT career. Many businesses require this accreditation when hiring computer technicians or validating the skills of current employees. This collection of practice tests allows you to: Access the test bank in the Sybex interactive learning environment Understand the subject matter through clear and accurate answers and explanations of exam objectives Evaluate your exam knowledge and concentrate on problem areas Integrate practice tests with other Sybex review and study guides, including the CompTIA A+ Complete Study Guide and the CompTIA A+ Complete Deluxe Study Guide Practice tests are an effective way to increase comprehension, strengthen retention, and measure overall knowledge. The CompTIA A+ Complete Practice Tests, Second Edition is an indispensable part of any study plan for A+ certification.

This is the official curriculum of the Apple High Sierra 101: OS X Support Essentials 10.13 course and preparation for Apple Certified Support Professional (ACSP) 10.13 certification—as well as a top-notch primer for anyone who needs to support, troubleshoot, or optimize macOS High Sierra. This guide provides comprehensive coverage of High Sierra and is part of the Apple Pro Training series—the only Apple-certified books on the market. Designed for support technicians, help desk specialists, and ardent Mac users, this guide takes you deep inside macOS High Sierra. You will find in-depth, step-by-step instruction on everything from installing and configuring High Sierra to managing networks and system administration. Whether you run a computer lab or an IT department, you’ll learn to set up users, configure system preferences, manage security and permissions, use diagnostic and repair tools, troubleshoot peripheral devices, and more—all on your way to preparing for the industry-standard ACSP certification. This is a step-by-step guide that works through lessons designed to teach practical, real-world tasks, with lesson files let you practice as you learn.

Recently, Apple, IBM, and Motorola formed an alliance to develop the next generation of computer technology, the PowerPC chip. Here is the inside story on this new technology that will put Apple ahead of Intel and Microsoft both technologically and economically. This book explains why the PowerPC chip is so important, how to upgrade, what's different from 680x0 machines, and how to migrate applications.

Current, essential IT networking skills made easy

Answers found here! Apple’s latest Mac software, macOS Mojave, is a glorious boxcar full of new features and refinements. What’s still not included, though, is a single page of printed instructions. Fortunately, David Pogue is back, delivering the expertise and humor that have made this the #1 bestselling Mac book for 18 years straight. The important stuff you need to know Big-ticket changes. The stunning new Dark Mode. Self-tidying desktop stacks. FaceTime video calls with up to 32 people. New screen-recording tools. If Apple has it, this book covers it. Apps. This book also demystifies the 50 programs that come with the Mac, including the four new ones in Mojave: News, Stocks, Home, and Voice Memos. Shortcuts. This must be the tippiest, trickiest Mac book ever written. Undocumented surprises await on every page. Power users. Security, networking, remote access, file sharing with Windows—this one witty, expert guide makes it all crystal clear. MacOS Mojave gives the Mac more polish, power, and pep— and in your hands, you hold the ultimate guide to unlocking its potential.