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What is New For vtreat 1.5.2?

vtreat version 1.5.2 just became available from CRAN.

We have a logged a few improvement in the NEWS. The changes are small and incremental, as the package is already in a great stable state for production use.

Continue reading What is New For vtreat 1.5.2?

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New Data Scientist Stickers

We have a new data scientist sticker!

IMG 1007

If you see Nina or John at a conference/MeetUp, please ask us for a sticker!

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wrapr Update: Removing Some Under-Used Functions and Classes

For the next version of the R package wrapr we are going to be removing a number of under-used functions/methods and classes. This update will likely happen in March 2020, and is the start of the wrapr 2.* series.

Most of the items being removed are different abstractions for helping with function composition. We ended up moving most of our work to category-theory based composition, so don’t think these various frameworks are needed any longer. If you have been using these items in your own projects, please reach out and we try and find a way to help you out.

Continue reading wrapr Update: Removing Some Under-Used Functions and Classes

Posted on Categories Administrativia, data science, Practical Data Science, Pragmatic Data Science, Pragmatic Machine Learning, Statistics, TutorialsTags , , , 2 Comments on wrapr 1.9.6 is now up on CRAN

wrapr 1.9.6 is now up on CRAN

wrapr 1.9.6 is now up on CRAN.

We unfortunately usually forget to say this. A big thank you to the staff and volunteers at CRAN.

Continue reading wrapr 1.9.6 is now up on CRAN

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Off topic: Horror Translations by Nina Zumel

In an off-topic post we would like to share a series of horror narrations based on Win Vector LLC’s very own Nina Zumel’s translations of Uruguayan author Horacio Quiroga. This is a free series produced by Rue Morgue

The first is: “The Feather Pillow.” DO NOT LISTEN TO THIS IN BED!

(YouTube link, Rue Morge link, Ephemera link)

More of Nina’s literary work can be found at: Ephemera Experiments in Writing, and Multo (Ghost).

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New Year’s Resolution 2020: Work on more R Data Science Projects

We had such a positive reception to our last Introduction to Data Science promotion, that we are going to try and make the course available to more people by lowering the base-price to $29.99. We are also creating a 1 month promotional price of $20.99. To get a permanent subscription to the course for less than $21 just visit this link https://www.udemy.com/course/introduction-to-data-science/ and use the discount code ITDS21 any time in January of 2020.

Combine this with the new second edition of Practical Data Science with R, and you have a great study set to succeed at substantial statistical modeling and analytics tasks using the R programming language.


PDSwR2Lego

(Note: Lego mini-fig not included!)

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Manning Deal of the Day January 3, 2020 : Half off Practical Data Science with R, Second Edition

Manning Deal of the Day January 3, 2020 : Half off Practical Data Science with R, Second Edition. Use code dotd010320au at http://bit.ly/39vD1G4

Please share!

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Introduction to Data Science in R, Free for 3 days

To celebrate the new year and the recent release of Practical Data Science with R 2nd Edition, we are offering a free coupon for our video course “Introduction to Data Science.”

The following URL and code should get you permanent free access to the video course, if used between now and January 1st 2020:

https://www.udemy.com/course/introduction-to-data-science/ code: PDSWR2

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Why to try Practical Data Science with R, 2nd Edition

I thought we would try to express why somebody interested in using the R language (and package ecosystem) for supervised machine learning, data wrangling, analytics projects, and other data science topics should give Practical Data Science with R, 2nd Edition a try.

Nina Zumel and I shared the book with two incredible data scientists (Jeremy Howard and Rachel Thomas), and they helped answer the question with the following as the Practical Data Science with R, 2nd Edition forward:

Practical Data Science with R, Second Edition, is a hands-on guide to data science, with a focus on techniques for working with structured or tabular data, using the R language and statistical packages. The book emphasizes machine learning, but is unique in the number of chapters it devotes to topics such as the role of the data scientist in projects, managing results, and even designing presentations. In addition to working out how to code up models, the book shares how to collaborate with diverse teams, how to translate business goals into metrics, and how to organize work and reports. If you want to learn how to use R to work as a data scientist, get this book.

We have known Nina Zumel and John Mount for a number of years. We have invited them to teach with us at Singularity University. They are two of the best data scientists we know. We regularly recommend their original research on cross-validation and impact coding (also called target encoding). In fact, chapter 8 of Practical Data Science with R teaches the theory of impact coding and uses it through the authors own R package: vtreat.

Practical Data Science with R takes the time to describe what data science is, and how a data scientist solves problems and explains their work. It includes careful descriptions of classic supervised learning methods, such as linear and logistic regression. We liked the survey style of the book and extensively worked examples using contest-winning methodologies and packages such as random forests and xgboost. The book is full of useful, shared experience and practical advice. We notice they even include our own trick of using random forest variable importance for initial variable screening.

Overall, this is a great book, and we highly recommend it.

Jeremy Howard and Rachel Thomas

About the forward authors.

Jeremy Howard is an entrepreneur, business strategist, developer, and educator. Jeremy is a founding researcher at fast.ai, a research institute dedicated to making deep learning more accessible. He is also a faculty member at the University of San Francisco, and is chief scientist at doc.ai and platform.ai.

Previously, Jeremy was the founding CEO of Enlitic, which was the first company to apply deep learning to medicine, and was selected as one of the worlds top 50 smartest companies by MIT Tech Review two years running. He was the president and chief scientist of the data science platform Kaggle, where he was the top-ranked participant in international machine learning competitions two years running.

Rachel Thomas is director of the USF Center for Applied Data Ethics and cofounder of fast.ai, which has been featured in The Economist, MIT Tech Review, and Forbes. She was selected by Forbes as one of 20 Incredible Women in AI, earned her math PhD at Duke, and was an early engineer at Uber. Rachel is a popular writer and keynote speaker. In her TEDx talk, she shares what scares her about AI and why we need people from all backgrounds involved with AI.

Zumel, Mount, Practical Data Science with R, 2nd Edition, Manning, 2019 is available from:

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Better SQL Generation via the data_algebra

In our recent note What is new for rquery December 2019 we mentioned an ugly processing pipeline that translates into SQL of varying size/quality depending on the query generator we use. In this note we try a near-relative of that query in the data_algebra.

Continue reading Better SQL Generation via the data_algebra