This practical book shows you how to bundle reusable R functions, sample data, and documentation together by applying author Hadley Wickham’s package development philosophy. In the process, you’ll work with devtools, roxygen, and testthat, a set of R packages that automate common development tasks. Devtools encapsulates best practices that Hadley has learned from years of working with this programming language. Ideal for developers, data scientists, and programmers with various backgrounds, this book starts you with the basics and shows you how to improve your package writing over time. You’ll learn to focus on what you want your package to do, rather than think about package structure. Learn about the most useful components of an R package, including vignettes and unit tests Automate anything you can, taking advantage of the years of development experience embodied in devtools Get tips on good style, such as organizing functions into files Streamline your development process with devtools Learn the best way to submit your package to the Comprehensive R Archive Network (CRAN) Learn from a well-respected member of the R community who created 30 R packages, including ggplot2, dplyr, and tidyr

    Peter Hinssen's most recent book

    The first of its kind, this book explores college football's current events, numbers, and tactics from a number of perspectives. It is an attempt to bridge the gap between the analytical side of the game and its real-life application. So many of us love this ridiculous sport; Study Hall gives us ways to love it even more. Table of Contents 1. It's Personal 2. An Ungovernable Mess 3. The Case for Computers 4. You, Me, and Stats 5. We Meet Again, Mr. Wizard 6. Coaches vs. Stats 7. The New Box Score 8. Advanced Stats 101 9. College Football's Curveball 10. QBs and the Passes They Throw 11. Sometimes Cliches Are Cliches for a Reason 12. The 'Spread Offense' Meme Dies 13. Beating, And Becoming, Goliath

    But with a million blogs, books, and videos out there, just where do you start? The worldwide best selling "You Don't Know JS" book series is back for a 2nd edition: "You Don't Know JS Yet". All 6 books are brand new, rewritten to cover all sides of JS for 2020 and beyond. "Get Started" prepares you for the journey ahead, first surveying the language then detailing how the rest of the You Don't Know JS Yet book series guides you to knowing JS more deeply.

    The Windows Command Line Beginner's Guide gives users new to the Windows command line an overview of the Command Prompt, from simple tasks to network configuration.In the Guide, you'll learn how to:-Manage the Command Prompt.-Copy & paste from the Windows Command Prompt.-Create batch files.-Remotely manage Windows machines from the command line.-Manage disks, partitions, and volumes.-Set an IP address and configure other network settings.-Set and manage NTFS and file sharing permissions.-Customize and modify the Command Prompt.-Create and manage file shares.-Copy, move, and delete files and directories from the command line.-Manage PDF files and office documents from the command line.-And many other topics.

    As more business intelligence pros begin using Power Pivot, they find that they do not have the Excel skills to clean the data in Excel; Power Query solves this problem. This book shows how to use the Power Query tool to get difficult data sets into both Excel and Power Pivot, and is solely devoted to Power Query dashboarding and reporting.

    It is also recommended for students studying btech, be, and other professional courses related to machine design. The book is systematic and is presented in clear and simple language. The syllabus of the book is in line with the course at nmims. It is good reference book for students of other colleges too. The book explains the life cycle of engineering design, with respect to machines beginning from identifying a problem, defining it in relatively simpler terms, considering the environment in which it operates, and finding a solution to solve problems or improvise methods. It includes more than 30 chapters like shafts, levers, chain drives, power screws, flywheel, springs, clutches, brakes, welding joints, pressure vessels, spur gears, internal combustion engine parts, bevel gears, pipes and pipe joints, worms gears, columns and struts, riveted joints, keys and coupling, and more. S chand publishing is the publisher of a textbook of machine design, and it was published in 2005. This 25th revised edition book is available in paperback. Key features: this is a multi-coloured edition with pictures, illustrations, diagrams, and graphics to support the concepts explained. About the authorsj k gupta and r s khurmi have authored the book. Dr r s khurmi worked as a professor in delhi university, and now he writes books on engineering. J k gupta is also a technical writer, and writes mostly in collaboration with r s khurmi. They have their individual authored books as well like strength of material, life and work of ramesh chunder dutta c. I. E, and history of sirsa town. Some of the books that have been authored by both of them are refrigeration tables with chart, textbook of refrigeration and airconditioning (m. E.

    More than 250 challenging practice questions have been completely revised to closely model the format, tone, topics, and difficulty of the real exam. An integrated study system based on proven pedagogy, exam coverage includes step-by-step exercises, special Exam Watch notes, On-the-Job elements, and Self Tests with in-depth answer explanations to help reinforce and teach practical skills.Praise for the author:"Finally A Java certification book that explains everything clearly. All you need to pass the exam is in this book."--Solveig Haugland, Technical Trainer and Former Sun Course Developer"Who better to write a Java study guide than Kathy Sierra, the reigning queen of Java instruction? Kathy Sierra has done it again--here is a study guide that almost guarantees you a certification "--James Cubeta, Systems Engineer, SGI"The thing I appreciate most about Kathy is her quest to make us all remember that we are teaching people and not just lecturing about Java. Her passion and desire for the highest quality education that meets the needs of the individual student is positively unparalleled at SunEd. Undoubtedly there are hundreds of students who have benefited from taking Kathy's classes."--Victor Peters, founder Next Step Education & Software Sun Certified Java Instructor"I want to thank Kathy for the EXCELLENT Study Guide. The book is well written, every concept is clearly explained using a real life example, and the book states what you specifically need to know for the exam. The way it's written, you feel that you're in a classroom and someone is actually teaching you the difficult concepts, but not in a dry, formal manner. The questions at the end of the chapters are also REALLY good, and I am sure they will help candidates pass the test. Watch out for this Wickedly Smart book."-Alfred Raouf, Web Solution Developer, Kemety.Net"The Sun Certification exam was certainly no walk in the park but Kathy's material allowed me to not only pass the exam, but Ace it "--Mary Whetsel, Sr. Technology Specialist, Application Strategy and Integration, The St. Paul Companies

    a quick, easy reference to using your Kindle Fire -- to the max!Amazon's Kindle Fire is the handiest tablet available, and is your portal to an infinite universe of education and entertainment. This valuable reference book helps you get the maximum bang for your Kindle bucks. You'll see how to quickly set up your Kindle, navigate the touch-screen, buy, rent or stream video, and browse the world's largest library of digital books.This reference guide from Amazon guru Steve Weber demystifies the Kindle and explains in plain English how to master the Kindle basics, plus secret tips, tricks and shortcuts you won't find elsewhere. Each section includes clearly written step-by-step instructions, illustrated with screenshots and menus just like you'll see on your own Kindle screen. You'll see how to:■ Change your Kindle's setting just the way you want.■ Charge your Kindle's battery properly and prolong its life.■ Enjoy an infinite supply of the best books, music and video from Amazon, iTunes or virtually any other source.■ Use personal and office documents, including word processing files, PDFs, and spreadsheets. Chuck your laptop and PDA, and do everything you want on your Kindle!■ The easy way to harvest your own content and get it onto your Kindle Fire, including gems you didn't buy at Amazon. ■ How to download free games and educational apps, plus free bonuses from Amazon's Android App Store or other sources.■ How to download, organize and read your favorite books, magazines and newspapers on the Kindle Fire.■ How to get current and archived editions of the world's most popular newspapers, magazines and websites streamed to your Kindle--updated constantly, with no fees whatsoever!■ Use Amazon's free "Cloud" service for unlimited storage of your digital content.■ Purchase or rent thousands of movies and TV shows, and how to find a gold mine of free video.■ Find the best free content in the world, downloadable to your Kindle. (You might never have to pay for books, movies or music again--ever!)■ Use Amazon Prime to stream movies using your home's Internet service.■ Use your Kindle to send and receive email from Gmail, Yahoo! Mail, Hotmail, and virtually any other service.■ Surf the Web at daredevil speeds using Kindle's built-in Silk Web browser.■ Show off your own photos and videos on your Kindle, no matter which camera you used.About the author:ABOUT THE AUTHOR: Steve Weber has been writing about Amazon for nearly a decade. He is the founding publisher of KindleBuffet.com, a website and newsletter that features the best free Kindle eBooks currently being offered as free promotions.

    Web analytics expert Avinash Kaushik, in his thought-provoking style, debunks leading myths and leads you on a path to gaining actionable insights from your analytics efforts. Discover how to move beyond clickstream analysis, why qualitative data should be your focus, and more insights and techniques that will help you develop a customer-centric mindset without sacrificing your company's bottom line. Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

    Stay in the know, spot trends as they happen, and push your business to new limits. This e-book introduces Microsoft Power BI basics through a practical, scenario-based guided tour of the tool, showing you how to build analytical solutions using Power BI. Get an overview of Power BI, or dig deeper and follow along on your PC using the book's examples.

    Instead, it is the product of over 20 years of scraped knuckles and attaboys earned while leading HR in public and private organizations. The book shares hard-won advice on what works in a wide range of HR topics,from reductions in force to paying for performance to managing workers compensation to leadership training. But readers will also benefit from experience in the often surprising aspects of HR work that are rarely discussed but are invaluable to success in the role, such as - What all organizations expect from the HR leader, like it or not - The one thing above all else that the company President really wants from the HR leader - How an HR leader can spot the A players and the problem children in the first month on a new job - How to answer the employee who asks if layoffs are coming – and they are Written in a conversational, often humorous style, The Little Black Book of Human Resources Management will shave a few points off the learning curve of anyone looking to advance in the field of human resources management.

    Chess for Beginners offers new players a quick-start guide to learn the game of chess and start winning in no time with rules, strategies, and tactics for success. Starting with the basics, this comprehensive guide provides a clear, illustrated introduction to the movements of each piece along with basic rules and game dynamics. With this foundation, new players will learn effective strategies and tactics to start playing competitively and confidently.From your first move to your last, Chess for Beginners shows you how to play your best game, with: A complete overview that introduces players to the chessboard and the movement of each piece with clear, easy-to-follow illustrations and directions. 10 strategies that show players how to control the board, think several moves ahead, go for a quick checkmate, and more! 10 tactics that offer short-term solutions to support your strategy and achieve checkmate. Position your pieces, coordinate your attack, and capture their king—Chess for Beginners teaches you all of the moves to play the perfect game.

    KEY TOPICS: Topics explored include wireless and wireline telecommunications systems, basic data communications networks and systems, local area networks, internetworks, and the Internet including TCP/IP protocol suite. MARKET: For professionals with a career or interest in electronic communications, data communications, and/or networking, as well as ECT, EET, and CET technologists.

    From creating new data-driven products through to increasing operational efficiency, big data has the potential to makeyour organization both more competitive and more innovative.As this emerging field transitions from the bleeding edge to enterprise infrastructure, it's vital to understand not only the technologies involved, but the organizational and cultural demands of being data-driven.Written by O'Reilly Radar's experts on big data, this anthology describes:- The broad industry changes heralded by the big data era- What big data is, what it means to your business, and how to start solving data problems- The software that makes up the Hadoop big data stack, and the major enterprise vendors' Hadoop solutions- The landscape of NoSQL databases and their relative merits- How visualization plays an important part in data work