This book is focused on the details of data analysis that sometimes fall through the cracks in traditional statistics classes and textbooks. It is based in part on the authors blog posts, lecture materials, and tutorials. The author is one of the co-developers of the Johns Hopkins Specialization in Data Science the largest data science program in the world that has enrolled more than 1.76 million people. The book is useful as a companion to introductory courses in data science or data analysis. It is also a useful reference tool for people tasked with reading and critiquing data analyses. It is based on the authors popular open-source guides available through his Github account (https://github.com/jtleek). The paper is also available through Leanpub (https://leanpub.com/datastyle), if the book is purchased on that platform you are entitled to lifetime free updates.

    If you're working with a relational database--whether you're writing applications, performing administrative tasks, or generating reports--you need to know how to interact with your data. Even if you are using a tool that generates SQL for you, such as a reporting tool, there may still be cases where you need to bypass the automatic generation feature and write your own SQL statements.To help you attain this fundamental SQL knowledge, look to "Learning SQL," an introductory guide to SQL, designed primarily for developers just cutting their teeth on the language."Learning SQL" moves you quickly through the basics and then on to some of the more commonly used advanced features. Among the topics discussed: The history of the computerized databaseSQL Data Statements--those used to create, manipulate, and retrieve data stored in your database; example statements include select, update, insert, and deleteSQL Schema Statements--those used to create database objects, such as tables, indexes, and constraintsHow data sets can interact with queriesThe importance of subqueriesData conversion and manipulation via SQL's built-in functionsHow conditional logic can be used in Data StatementsBest of all, "Learning SQL" talks to you in a real-world manner, discussing various platform differences that you're likely to encounter and offering a series of chapter exercises that walk you through the learning process. Whenever possible, the book sticks to the features included in the ANSI SQL standards. This means you'll be able to apply what you learn to any of several different databases; the book covers MySQL, Microsoft SQL Server, and Oracle Database, but the features and syntax should apply just as well (perhaps with some tweaking) to IBM DB2, Sybase Adaptive Server, and PostgreSQL.Put the power and flexibility of SQL to work. With "Learning SQL" you can master this important skill and know that the SQL statements you write are indeed correct.

    Salesforce.com (more than 50%) and Twitter (more than 75% fall into this category. Ebay gets more than 8 billion API calls a month. Facebook and Google, have dozens of APIs that enable both free services and e-commerce, get more than 5 billion API calls each day. Other companies like NetFlix have expanded their service of streaming movies over the the web to dozens of devices using API. At peak times, more than 20 percent of all traffic is accounted for by Netflix through its APIs. Companies like Sears and E-Trade are opening up their catalogs and other services to allow developers and entrepreneurs to create new marketing experiences. Making an API work to create a new channel is not just a matter of technology. An API must be considered in terms of business strategy, marketing, and operations as well as the technical aspects of programming. This book, written by Greg Brail, CTO of Apigee, and Brian Mulloy, VP of Products, captures the knowledge of all these areas gained by Apigee, the leading company in supporting the rollout of high traffic APIs.

    Who are these people, what motivates them, and why should you care?Consider these facts: Everything around us is turning into computers. Your typewriter is gone, replaced by a computer. Your phone has turned into a computer. So has your camera. Soon your TV will. Your car was not only designed on computers, but has more processing power in it than a room-sized mainframe did in 1970. Letters, encyclopedias, newspapers, and even your local store are being replaced by the Internet.Hackers & Painters: Big Ideas from the Computer Age, by Paul Graham, explains this world and the motivations of the people who occupy it. In clear, thoughtful prose that draws on illuminating historical examples, Graham takes readers on an unflinching exploration into what he calls “an intellectual Wild West.”The ideas discussed in this book will have a powerful and lasting impact on how we think, how we work, how we develop technology, and how we live. Topics include the importance of beauty in software design, how to make wealth, heresy and free speech, the programming language renaissance, the open-source movement, digital design, internet startups, and more.

    Your online and in-store purchasing patterns are recorded, and reveal if you're unemployed, sick, or pregnant. Your e-mails and texts expose your intimate and casual friends. Google knows what you’re thinking because it saves your private searches. Facebook can determine your sexual orientation without you ever mentioning it.The powers that surveil us do more than simply store this information. Corporations use surveillance to manipulate not only the news articles and advertisements we each see, but also the prices we’re offered. Governments use surveillance to discriminate, censor, chill free speech, and put people in danger worldwide. And both sides share this information with each other or, even worse, lose it to cybercriminals in huge data breaches.Much of this is voluntary: we cooperate with corporate surveillance because it promises us convenience, and we submit to government surveillance because it promises us protection. The result is a mass surveillance society of our own making. But have we given up more than we’ve gained? In Data and Goliath, security expert Bruce Schneier offers another path, one that values both security and privacy. He brings his bestseller up-to-date with a new preface covering the latest developments, and then shows us exactly what we can do to reform government surveillance programs, shake up surveillance-based business models, and protect our individual privacy. You'll never look at your phone, your computer, your credit cards, or even your car in the same way again.

    We need a way to relate to it. Enter David McCandless and his stunning infographics, simple, elegant ways to interact with information too complex or abstract to grasp any way but visually. McCandless creates visually stunning displays that blend the facts with their connections, contexts, and relationships, making information meaningful, entertaining, and beautiful. And his genius is as much in finding fresh ways to provocatively combine datasets as it is in finding new ways to show the results.Knowledge is Beautiful is a fascinating spin through the world of visualized data, all of it bearing the hallmark of David McCandless's boundary-breaking, signature style. The captivating follow-up to the bestseller The Visual Miscellaneum, Knowledge is Beautiful offers a deeper, more ranging look at the world and its history, with more connectivity between the pages, a greater exploration of causes and consequences, and a more inclusive global outlook. With a portion of its content crowd-sourced from McCandless's international following, Knowledge is Beautiful achieves a revolutionary and democratic look at the key issues from questions on history and politics, the facts of science, streams of literature, and much more.This is a project that will truly push the boundaries of books everywhere, providing insights into our world in a way never seen before.

    Significant numbers of poorly designed programs have been created by less-experienced developers, resulting in applications that are inefficient and hard to maintain and extend. Increasingly, software system professionals are discovering just how difficult it is to work with these inherited, non-optimal applications. For several years, expert-level object programmers have employed a growing collection of techniques to improve the structural integrity and performance of such existing software programs. Referred to as refactoring, these practices have remained in the domain of experts because no attempt has been made to transcribe the lore into a form that all developers could use... until now. In Refactoring: Improving the Design of Existing Software, renowned object technology mentor Martin Fowler breaks new ground, demystifying these master practices and demonstrating how software practitioners can realize the significant benefits of this new process.

    The answers aren't easy -- just incredibly successful.

    This innovative book presents the design process and the best software tools for creating infographics that communicate. Including a special section on how to construct the increasingly popular infographic resume, the book offers graphic designers, marketers, and business professionals vital information on the most effective ways to present data.Explains why infographics and data visualizations work Shares the tools and techniques for creating great infographics Covers online infographics used for marketing, including social media and search engine optimization (SEO) Shows how to market your skills with a visual, infographic resume Explores the many internal business uses of infographics, including board meeting presentations, annual reports, consumer research statistics, marketing strategies, business plans, and visual explanations of products and services to your customers With Cool Infographics, you'll learn to create infographics to successfully reach your target audience and tell clear stories with your data.

    We all need to know what it is and how it works - that much is obvious. But is a basic understanding of the theory enough to hold your own in strategy meetings? Probably. But what will set you apart from the rest is actually knowing how to USE big data to get solid, real-world business results - and putting that in place to improve performance. Big Data will give you a clear understanding, blueprint, and step-by-step approach to building your own big data strategy. This is a well-needed practical introduction to actually putting the topic into practice. Illustrated with numerous real-world examples from a cross section of companies and organisations, Big Data will take you through the five steps of the SMART model: Start with Strategy, Measure Metrics and Data, Apply Analytics, Report Results, Transform. Discusses how companies need to clearly define what it is they need to know Outlines how companies can collect relevant data and measure the metrics that will help them answer their most important business questions Addresses how the results of big data analytics can be visualised and communicated to ensure key decisions-makers understand them Includes many high-profile case studies from the author's work with some of the world's best known brands

    It used to be that to diagnose an illness, interpret legal documents, analyze foreign policy, or write a newspaper article you needed a human being with specific skills—and maybe an advanced degree or two. These days, high-level tasks are increasingly being handled by algorithms that can do precise work not only with speed but also with nuance. These “bots” started with human programming and logic, but now their reach extends beyond what their creators ever expected. In this fascinating, frightening book, Christopher Steiner tells the story of how algorithms took over—and shows why the “bot revolution” is about to spill into every aspect of our lives, often silently, without our knowledge. The May 2010 “Flash Crash” exposed Wall Street’s reliance on trading bots to the tune of a 998-point market drop and $1 trillion in vanished market value. But that was just the beginning. In Automate This, we meet bots that are driving cars, penning haiku, and writing music mistaken for Bach’s. They listen in on our customer service calls and figure out what Iran would do in the event of a nuclear standoff. There are algorithms that can pick out the most cohesive crew of astronauts for a space mission or identify the next Jeremy Lin. Some can even ingest statistics from baseball games and spit out pitch-perfect sports journalism indistinguishable from that produced by humans. The interaction of man and machine can make our lives easier. But what will the world look like when algorithms control our hospitals, our roads, our culture, and our national security? What hap­pens to businesses when we automate judgment and eliminate human instinct? And what role will be left for doctors, lawyers, writers, truck drivers, and many others?  Who knows—maybe there’s a bot learning to do your job this minute.

    Loosely based on neuron behavior inside of human brains, these systems are rapidly catching up with the intelligence of their human creators, defeating the world champion Go player, achieving superhuman performance on video games, driving cars, translating languages, and sometimes even helping law enforcement fight crime. Deep Learning is a revolution that is changing every industry across the globe.Grokking Deep Learning is the perfect place to begin your deep learning journey. Rather than just learn the “black box” API of some library or framework, you will actually understand how to build these algorithms completely from scratch. You will understand how Deep Learning is able to learn at levels greater than humans. You will be able to understand the “brain” behind state-of-the-art Artificial Intelligence. Furthermore, unlike other courses that assume advanced knowledge of Calculus and leverage complex mathematical notation, if you’re a Python hacker who passed high-school algebra, you’re ready to go. And at the end, you’ll even build an A.I. that will learn to defeat you in a classic Atari game.

    Six years later they have teamed up again to report that social media is but one of five converging forces that promise to change virtually every aspect of our lives. You know these other forces already: mobile, data, sensors and location-based technology. Combined with social media they form a new generation of personalized technology that knows us better than our closest friends. Armed with that knowledge our personal devices can anticipate what we’ll need next and serve us better than a butler or an executive assistant. The resulting convergent superforce is so powerful that it is ushering in a era the authors call the Age of Context. In this new era, our devices know when to wake us up early because it snowed last night; they contact the people we are supposed to meet with to warn them we’re running late. They even find content worth watching on television. They also promise to cure cancer and make it harder for terrorists to do their damage. Astoundingly, in the coming age you may only receive ads you want to see. Scoble and Israel have spent more than a year researching this book. They report what they have learned from interviewing more than a hundred pioneers of the new technology and by examining hundreds of contextual products. What does it all mean? How will it change society in the future? The authors are unabashed tech enthusiasts, but as they write, an elephant sits in the living room of our book and it is called privacy. We are entering a time when our technology serves us best because it watches us; collecting data on what we do, who we speak with, what we look at. There is no doubt about it: Big Data is watching you. The time to lament the loss of privacy is over. The authors argue that the time is right to demand options that enable people to reclaim some portions of that privacy.

    Across all of these break-out companies, a set of common patterns has evolved into a repeatable playbook that Gil has codified in High Growth Handbook. Covering key topics including the role of the CEO, managing your board, recruiting and managing an executive team, M&A, IPOs and late stage funding rounds, and interspersed with over a dozen interviews with some of the biggest names in Silicon Valley including Reid Hoffman (LinkedIn), Marc Andreessen (Andreessen Horowitz), and Aaron Levie (Box), High Growth Handbook presents crystal clear guidance for navigating the most complex challenges that confront leaders and operators in high-growth startups. In what Reid Hoffman, cofounder of LinkedIn and co-author of the #1 NYT bestsellers The Alliance and The Startup of You calls "a trenchant guide," High Growth Handbook is the playbook for turning a startup into a unicorn. "Elad Gil is one of Silicon Valley's seriously knowledgeable and battle-tested players. If you want the chance to turn your startup into the next Google or Twitter, then read this trenchant guide from someone who played key roles in the growth of these companies." - Reid Hoffman, co-founder of LinkedIn, co-author of the #1 NYT bestsellers "The Alliance" and "The Startup of You," and host of the podcast Masters of Scale "Elad eschews trite management aphorisms in favor of pragmatic and straight-shooting insights on complex topics like managing a board of directors, executing functional re-organizations with as little trauma as possible, and everything in-between." - Dick Costolo, former CEO of Twitter and serial entrepreneur "Elad first invested in Airbnb when we were less than 10 people and provided early advice on scaling the company. This book shares these learnings for the next generation of entrepreneurs." - Nathan Blecharczyk, cofounder of Airbnb, Chief Strategy Officer, and Chairman of Airbnb China "Elad jam-packs every useful lesson about building and scaling companies into a single, digestible book. My only gripe is that he didn't write this when we were in the early days of Box as it would have saved my ass countless times." -Aaron Levie, cofounder and CEO of Box "Armed with observations gathered scaling some of the most successful and important companies of Silicon Valley, Elad has no-nonsense, highly applicable advice to any operator transitioning a company from the proverbial garage to the next stage and beyond." - Max Levchin, cofounder and CEO of Affirm, cofounder and CTO of PayPal "Elad is one of the most experienced operators in Silicon Valley having seen numerous companies hit their inflection point. His advice has been key for Coinbase as we go through hypergrowth, from hiring executives to improving M&A." - Brian Armstrong, cofounder and CEO of Coinbase"Elad is one of the best connected and respected early stage investors in the Valley - he invested in Minted when we had fewer than 50 employees and his advice was critical to us in growing our business to where we are now, in the low hundreds of millions in sales. In his book, he crystallizes all of these learnings for the next generation of companies."-Mariam Naficy, cofounder and CEO of Minted

    This book describes BEAM✲, an agile approach to dimensional modeling, for improving communication between data warehouse designers, BI stakeholders and the whole DW/BI development team. BEAM✲ provides tools and techniques that will encourage DW/BI designers and developers to move away from their keyboards and entity relationship based tools and model interactively with their colleagues. The result is everyone thinks dimensionally from the outset! Developers understand how to efficiently implement dimensional modeling solutions. Business stakeholders feel ownership of the data warehouse they have created, and can already imagine how they will use it to answer their business questions. Within this book, you will learn: ✲ Agile dimensional modeling using Business Event Analysis & Modeling (BEAM✲) ✲ Modelstorming: data modeling that is quicker, more inclusive, more productive, and frankly more fun! ✲ Telling dimensional data stories using the 7Ws (who, what, when, where, how many, why and how) ✲ Modeling by example not abstraction; using data story themes, not crow's feet, to describe detail ✲ Storyboarding the data warehouse to discover conformed dimensions and plan iterative development ✲ Visual modeling: sketching timelines, charts and grids to model complex process measurement - simply ✲ Agile design documentation: enhancing star schemas with BEAM✲ dimensional shorthand notation ✲ Solving difficult DW/BI performance and usability problems with proven dimensional design patterns Lawrence Corr is a data warehouse designer and educator. As Principal of DecisionOne Consulting, he helps clients to review and simplify their data warehouse designs, and advises vendors on visual data modeling techniques. He regularly teaches agile dimensional modeling courses worldwide and has taught dimensional DW/BI skills to thousands of students. Jim Stagnitto is a data warehouse and master data management architect specializing in the healthcare, financial services, and information service industries. He is the founder of the data warehousing and data mining consulting firm Llumino.