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Data Smart: Using Data Science to Transform Information into Insight [Format Kindle]

John W. Foreman

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Descriptions du produit

Présentation de l'éditeur

Data Science gets thrown around in the press like it's magic. Major retailers are predicting everything from when their customers are pregnant to when they want a new pair of Chuck Taylors. It's a brave new world where seemingly meaningless data can be transformed into valuable insight to drive smart business decisions.

But how does one exactly do data science? Do you have to hire one of these priests of the dark arts, the "data scientist," to extract this gold from your data? Nope.

Data science is little more than using straight-forward steps to process raw data into actionable insight. And in Data Smart, author and data scientist John Foreman will show you how that's done within the familiar environment of a spreadsheet. 

Why a spreadsheet? It's comfortable! You get to look at the data every step of the way, building confidence as you learn the tricks of the trade. Plus, spreadsheets are a vendor-neutral place to learn data science without the hype. 

But don't let the Excel sheets fool you. This is a book for those serious about learning the analytic techniques, the math and the magic, behind big data.

 Each chapter will cover a different technique in a spreadsheet so you can follow along:

  • Mathematical optimization, including non-linear programming and genetic algorithms
  • Clustering via k-means, spherical k-means, and graph modularity
  • Data mining in graphs, such as outlier detection
  • Supervised AI through logistic regression, ensemble models, and bag-of-words models
  • Forecasting, seasonal adjustments, and prediction intervals through monte carlo simulation
  • Moving from spreadsheets into the R programming language

You get your hands dirty as you work alongside John through each technique. But never fear, the topics are readily applicable and the author laces humor throughout. You'll even learn what a dead squirrel has to do with optimization modeling, which you no doubt are dying to know.

Quatrième de couverture

"Data Smart makes modern statistic methods and algorithms understandable and easy to implement. Slogging through textbooks and academic papers is no longer required!"
Patrick Crosby, Founder of StatHat & first CTO at OkCupid

"When Mr. Foreman interviewed for a job at my company, he arrived dressed in a ′Kentucky Colonel′ kind of suit and spoke about nonsensical things like barbecue, lasers, and orange juice pulp. Then, he explained how to de–mystify and solve just about any complex ′big data′ problem in our company with simple spreadsheets. No server clusters, mainframes, or Hadoop–a–ma–jigs. Just Excel. I hired him on the spot. After reading this book, you too will learn how to use math and basic spreadsheet formulas to improve your business or, at the very least, how to trick senior executives into hiring you as their data scientist."
Ben Chestnut, Founder & CEO of MailChimp

"You need a John Foreman on your analytics team. But if you can′t have John, then reading this book is the next best thing."
Patrick Lennon, Director of Analytics, The Coca–Cola Company

Most people are approaching data science all wrong. Here′s how to do it right.

Not to disillusion you, but data scientists are not mystical practitioners of magical arts. Data science is something you can do. Really. This book shows you the significant data science techniques, how they work, how to use them, and how they benefit your business, large or small. It′s not about coding or database technologies. It′s about turning raw data into insight you can act upon, and doing it as quickly and painlessly as possible.

Roll up your sleeves and let′s get going.

Relax it′s just a spreadsheet

Visit the companion website at www.wiley.com/go/datasmart to download spreadsheets for each chapter, and follow them as you learn about:

  • Artificial intelligence using the general linear model, ensemble methods, and naive Bayes
  • Clustering via k–means, spherical k–means, and graph modularity
  • Mathematical optimization, including non–linear programming and genetic algorithms
  • Working with time series data and forecasting with exponential smoothing
  • Using Monte Carlo simulation to quantify and address risk
  • Detecting outliers in single or multiple dimensions
  • Exploring the data–science–focused R language

Détails sur le produit

  • Format : Format Kindle
  • Taille du fichier : 83634 KB
  • Nombre de pages de l'édition imprimée : 432 pages
  • Editeur : Wiley; Édition : 1 (31 octobre 2013)
  • Vendu par : Amazon Media EU S.à r.l.
  • Langue : Anglais
  • ASIN: B00F0WRXI0
  • Synthèse vocale : Activée
  • X-Ray :
  • Word Wise: Activé
  • Composition améliorée: Activé
  • Classement des meilleures ventes d'Amazon: n°17.367 dans la Boutique Kindle (Voir le Top 100 dans la Boutique Kindle)

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Amazon.com: 4.8 étoiles sur 5  83 commentaires
165 internautes sur 169 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Insightful, practical, and colorful. Perspective from a biased reviewer. 5 novembre 2013
Par Evan Miller - Publié sur Amazon.com
Format:Broché|Achat vérifié
Disclaimer: I served as a paid technical editor for Data Smart. I am not affiliated with the publisher, but I did receive a small fee for double-checking the book's mathematical content before it went to press. I also went to elementary school with the author. So as you read the rest of the review, keep in mind that this reviewer's judgment could be clouded by my lifelong allegiance to Lookout Mountain Elementary School, as well as the Scarface-esque pile of one dollar bills currently sitting on my kitchen table.

Anyway, books about "Data" seem to fit into one of the following categories:

* Extremely technical gradate-level mathematics books with lots of Greek letters and summation signs

* Pie-in-the-sky business bestsellers about how "Data" is going to revolutionize the world as we know it. (I call these "Moneyball" books)

* Technical books about the hottest new "Big Data" technology such as R and Hadoop

Data Smart is none of these. Unlike "Moneyball" books, Data Smart contains enough practical information to actually start performing analyses. Unlike most textbooks, it doesn't get bogged down in mathematical notation. And unlike books about R or the distributed data blah-blah du jour, all the examples use good old Microsoft Excel. It's geared toward competent analysts who are comfortable with Excel and aren't afraid of thinking about problems in a mathematical way. It's goal isn't to "revolutionize" your business with million-dollar software, but rather to make incremental improvements to processes with accessible analytic techniques.

I don't work at a big company, so I can't attest to the number of dollars your company will save by applying the book's methods. But I can attest that the author makes difficult mathematical concepts accessible with his quirky sense of humor and gift for metaphor. For example, I previously had not been exposed to the nitty-gritty of clustering techniques. After a couple of hours with the clustering chapters, which include illuminating diagrams and spreadsheet formulas, I felt like I had a good handle on the concepts, and would feel comfortable implementing the ideas in Excel -- or any other language, for that matter.

What I like most about the book is that it doesn't try to wave a magic data wand to cure all of your company's ills. Instead it focuses on a few areas where data and analytic techniques can deliver a concrete benefit, and gives you just enough to get started. In particular:

* Optimization techniques (Ch. 4) can systematically reduce the cost of manufacturing inputs

* Clustering techniques (Ch. 2 and 5) can deliver insights into customer behavior

* Predictive techniques (Ch. 3, 6, and 7) can increase margins with better predictions of uncertain outcomes

* Forecasting techniques (Ch. 8) can reduce waste with better demand planning

It may take some creativity to figure out how to apply the methods to your own business processes, but all of the techniques are "tried and true" in the sense of being widely deployed at large companies with big analytics budgets and teams of Ph.D.'s on staff. This book's contribution is to make these techniques available to anyone with a little background in applied mathematics and a copy of Excel. For that reason, despite the absence of glitter and/or Jack Welch on the book's cover, I think Data Smart is an important business book.

I had a few criticisms of the book as I was reading drafts, but almost all of them were addressed before the final revision. For the sake of completeness, I'll tell you what they were. Some of the chapters ran on a bit long, but these have been split up into manageable pieces. The Optimization chapter is a bit of a doozie, and used to be at the very beginning, but the reader can now "warm up" with some easier chapters on clustering and simple Bayesian techniques. The Regression chapter originally didn't discuss Receiver Operating Characteristic curves, which are important for evaluating predictive models visually, but now ROC curves are abundant.

Only one real criticism from me remains: I would have liked to see more on quantile regression, which is only mentioned in passing. It's a great technique for dealing with outlier-heavy data. The book by Koenker has good but highly mathematical coverage, and I would have loved to see this subject given the Foreman treatment. But, you can't have everything, and I suppose John needs to leave some material for Data Smart 2: The Spreadsheet of Doom.

In sum, Data Smart is a well-written and engaging guide to getting new insights from data using familiar tools. The techniques aren't really cutting-edge -- in fact, most have been around for decades -- but to my knowledge this is the first time they've been presented in a way that Excel-slinging business analysts can apply the methods without needing her own team of operations researchers and data scientists. If you're not sure whether the book's sophistication is on par with your own skills, you can download a complete sample chapter (as well as example spreadsheets) from the author's website.

One last thing: unlike many books with a technical bent, the prose is engaging and extremely clear. I think this can be traced to John's childhood. When John misbehaved, his father (who is a professor of English) would punish John by forcing him to read a novel by Charles Dickens. Minor infractions resulted in A Christmas Carol being meted out, and when he was really bad he had to read Great Expectations. This is a true story which you should ask John about if you see him at a book-signing event.
69 internautes sur 70 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Reminds you that technical books can be insightful and fun to read 20 décembre 2013
Par Jim Vallandingham - Publié sur Amazon.com
When I began to read the introduction for this book, after receiving it as a gift - I was a bit disheartened. I am not one of personas listed in the 'Who Are You" section - a CEO or VP of an online startup, a beginner BI analyst. Instead, I am a software developer specializing in data visualization and data analysis.

Furthermore, Excel is far from my preferred research tool of choice. I like code instead of screenshots. Python, Ruby, and R are where I turn when I want to look at data.

*Even* with this mismatch of intended audience, I found myself engrossed in this book, reading it cover to cover in a few days.

Data Smart is a wonderful resource. The use of Excel as a primary means for exploring data science concepts is surprisingly effective. It strips away all the code magic. You can't rely on SciKit-learn, or Weka, or even proper functions when all you have are cells and sheets.

Instead, it provides a way for John Foreman to break down these complex concepts into the fundamental components that make them tick. You start to see the patterns between seemingly disparate technologies that are actually built off the same few bits of logic. Things start to click.

The writing and real-world situations are really what make it fun and worth reading through and enjoying the ride. John's style hits the sweet spot between clarity and comical. Each chapter is well scoped. You understand the rational behind why someone might want to use the particular tool being described to solve the problem at hand. The whimsy and flare added by the author moves the plot along at a good pace. The problems are simple enough to wrap your head around - but not toys. The datasets generated for this book must have taken a while to curate. The book is really fun to read.

I think for me this book provides a great reminder of the landscape of data science tools, as well as a story-telling process to describe and relate these tools to non-programmy non-programmers.

Even if you aren't a startup CEO... yet - this book is worth having on your shelf. Check it out today!
25 internautes sur 27 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Data Science and Advanced Analytic Techniques for the Masses!! 5 novembre 2013
Par Jeff F - Publié sur Amazon.com
This book is perfect for the business or technical person that needs to understand the "magic" the analysts or data scientists are doing, as well as anyone that needs to be conversant in the techniques and avoid being bamboozled by consultants and software sellers.

Rather than focus on the data scientist or provide yet another useless big data overview, with very easy to understand language and a nice touch of humor, Mr. Foreman makes the nuts and bolts of analytic techniques easily understood and relevant for anyone with basic math skills and a spreadsheet program on their PC or Mac.

Mr. Foreman, with many easily understood real world-ish examples (e.g., Joey Bag O'Donuts Wholesale Wine Emporium) teaches a wide variety of AI, clustering, mathematical optimization, time series/forecasting, simulation and other techniques as well as when to employ them.
27 internautes sur 31 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Smartly written, extremely valuable insights 4 janvier 2014
Par M. L Lamendola - Publié sur Amazon.com
Having been involved in both electrical power monitoring (very data intensive) and business intelligence software (provides business reports from database sources) for well over a decade now, I agree with the author's premise that there's a difference between data and information. I wrote an article on this subject for the Crystal Reports market, and it's featured on the Crystalkeen Website. Too much of what pretends to be "analysis" or "information" or "business reports" is simply reformatted data and not very useful.

Another premise of this author is that the data analysis function serves the business, not the other way around. This point is often lost upon those who are supposed to provide the analysis. Rather than answer business questions, they just provide analysis. Their thinking, such that it is, revolves around the idea that they best do their jobs when they can do the neatest tricks with the analysis system.

These are just two examples of several "wrong thinking" ideas that Foreman addresses in this book. Because these "wrong thinking" ideas are pervasive and cause the misallocation of millions of dollars of resources in the typical large company, this book is worth several thousand times its cover price for the typical large company. Scale down the cost as you scale down the enterprise, and the multiplier is obviously less dramatic but still quite potent. Assuming, of course, the reader grasps what Foreman is saying and acts upon those new insights.

This assumption has some teeth to it, because Foreman is a very clever writer. In addition to using humor to keep the reader engaged, he apparently labored long and hard over his word choices to get clear meaning across to the reader. This is something I greatly appreciate in a work of nonfiction. Typically, the subject matter expert lacks such a command of English and something gets a bit muffed in the translation from text to the mind of the reader.

Now, that's my commentary on the high-level stuff. Which does not comprise the bulk of this book. I addressed it first because, to me, this alone makes this book a "must read" for anyone involved in data analysis, business intelligence, or related fields. Too many in these fields cannot see the forest for the trees, and their penchant for getting mired down in insignificant details shows in the results of their work. They wonder why users waste many hours trying to do their own analysis in Excel, instead of looking at whether they are providing a useful service to the business and its decision-making needs.

Let's move on to the technical stuff covered in this book. At one time in my career, I was a spreadsheet junkie. I built very complex models in Excel. So I was delighted to walk through Foreman's examples and tutorials on using Excel to do various kinds of analysis. These examples and tutorials comprise the bulk of this book, but they are not the point of the book.

Let me explain by analogy. I'm not sure if this reaches the typical reader, but try to follow (and accept my apologies if it's a dud). In electrical engineering today, software does the number crunching for you. But in engineering school (and often in the friendly debates engineers have), the modus is on manually doing the calculations. When you read the electrical engineering trade publications, you find not an admonition to run the example through your software but you find manual calculations being walked through.

The reason, in all instances, is the participants must be able to understand the concepts. You can do this only by crunching the numbers yourself and following along in the mental processes of arriving at the answer. So the author of an article might provide quite a trail of calculation to prove a point. It's the point that matters, not the calculation per se. But you don't get the point unless you can see how it's arrived at.

For example, in this book Foreman discusses K-analysis. How can you really understand this without working through some examples and watching the effects on the data? Answer: You can't.

To me, being walked through this litany of hard-to-grasp data analysis concepts is the only way a person can really understand those concepts. I think a mere surface knowledge is insufficient (a little knowledge is dangerous....). Even outside the realm of data analysis, people toss about terms they clearly do not understand but think they do. But based on my many years interacting with Crystal Reports administrators and trainers, I think the problem is especially pernicious in this particular field of data analysis. If you really want to know what you're talking about, you need to do the learning work.

The first nine chapters walk the reader through data analysis concepts. Chapter 10 is an introduction to an analysis program called R. Foreman begins by summing up the previous nine chapters as an exercise in learning analytics and then making it clear that Excel isn't the right tool for actually doing analytics.

I don't believe Foreman is trying to "sell" R per se. It's what he's familiar with. There are other tools for data analysis, including the big players in the Business Intelligence (BI) market, such as Crystal Reports and Cognos. Basically, if you want an effective, accurate, efficient way to answer business decision-making questions from the data your business gathers, you need to step up to a tool designed for that job. And, of course, you need an adequate database behind it.

Foreman has excellent advise in his 11th chapter (which is not numbered), "Conclusion." It's only six pages long, but what he says in here is profound. If you, as the reader, grasp nothing else but what's in this conclusion, the book has served you well.
9 internautes sur 9 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 The Perfect Book for Meaningful Data Analysis 11 août 2014
Par Michael Matthews - Publié sur Amazon.com
Format:Format Kindle|Achat vérifié
This is an excellent book and incredibly powerful if you're in any sort of field that requires data analysis. I've read many books on the subject of statistical analysis and most seem to fall in the category of:

1.) A very technical "how-to" on using Excel/R/whatever to run certain functions but there is a huge assumption that you understand what the data output means. These are more like user manuals for their respective programs.

2.) A more high-level view of stats that is similar to stuff you learned in Statistics 101 but with far less examples and it can be difficult to see how this will apply in your position.

Foreman's book was recommended to me by Chandoo of Excel Guru fame and it is the book I've been searching for to step up my game. He does a great job of breaking down core concepts and introducing new tools(all in Excel!) that I can actually apply to my current position. That being said, there are a couple of caveats...

1.) I would recommend at least 6 months of solid Excel usage under your belt. The author goes over the formulas and you can download the files online, however there is plenty of OFFSET and Array formulas that can be intimidating to more casual users. I highly recommend downloading the files and doing everything from scratch, and then using the author's version as reference when you get stuck.

2.) This is not really a book you can breeze through(and I mean this as a compliment). The core concepts are broken down well but you will need to reread chapters to truly understand how the formulas and underlying concepts fit. I personally read Chapter 2 around 5-6 times so I can grasp k-means clustering and how I can apply it to my current project. I've only been in the data analysis world for a couple of years, so perhaps this is just my noviceness showing.

This is a fantastic book and one I cannot recommend enough. I hope that Foreman continues to expand on this series as I really enjoy his writing style and his ability to confer what's truly important in data science.
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