Improved vtreat documentation

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Nina Zumel has donated some time to greatly improve the vtreat R package documentation (now available as pre-rendered HTML here).

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vtreat is an R data.frame processor/conditioner package that helps prepare real-world data for predictive modeling in a statistically sound manner. Continue reading Improved vtreat documentation

Half off Win-Vector data science books and video training!

Posted on Categories Administrativia, Practical Data Science, StatisticsTags , , 1 Comment on Half off Win-Vector data science books and video training!

We are pleased to announce our book Practical Data Science with R (Nina Zumel, John Mount, Manning 2014) is part of Manning’s “Deal of the Day” of April 9th 2016. This one day only offer gets you half off for physical book (with free e-copy) or paid e-copy (e-copy simultaneous pdf + ePub + kindle, and DRM free!).

Here is the discount count in Tweetable form (please Tweet/share!):

Deal of the Day April 9: Half off my book Practical Data Science with R. Use code dotd040916au at https://www.manning.com/books/practical-data-science-with-r

In celebration of this we are offering our video instruction course Introduction to Data Science (Nina Zumel, John Mount 2015) is also half off with “code C3” (https://www.udemy.com/introduction-to-data-science/?couponCode=C3).

Upcoming Win-Vector LLC appearances

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Win-Vector LLC will be presenting on statistically validating models using R and data science at:

We will share code and examples.

Registration required (and Strata is a paid conference). Please Tweet/forward. We hope to see you soon!

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More on preparing data

Posted on Categories Administrativia, Opinion, Practical Data Science, Pragmatic Data Science, Pragmatic Machine Learning, Statistics, TutorialsTags , , Leave a comment on More on preparing data

The Microsoft Data Science User Group just sponsored Dr. Nina Zumel‘s presentation “Preparing Data for Analysis Using R”. Microsoft saw Win-Vector LLC‘s ODSC West 2015 presentation “Prepping Data for Analysis using R” and generously offered to sponsor improving it and disseminating it to a wider audience.



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We feel Nina really hit the ball out of the park with over 400 new live viewers. Read more for links to even more free materials! Continue reading More on preparing data

Win-Vector video courses: price/status changes

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Win-Vector LLC has been offering a couple of online video courses on the topics of data science and A/B testing (both using R). These are high quality courses and well worth the money and time needed to work through them closely (with all materials distributed on GitHub).

Our current distributor is Udemy, which has just announced a unilateral change in pricing policy (March 2, 2016). This note is about the current status of these courses. Continue reading Win-Vector video courses: price/status changes

More Shiny user showcase demonstrations

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We at Win-Vector LLC are very proud to announce that RStudio just inducted two more of our demonstration Shiny applications into their Shiny User Showcase gallery. Continue reading More Shiny user showcase demonstrations

What does a “slow news day” look like at Win-Vector LLC?

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We at Win-Vector LLC have been writing this blog for almost 9 years. In that time we have accumulated a lot of what we feel is very good writing on data science topics (277 posts and 687 contributed comments). Below is what a “slow news day” looks like on the WordPress pages viewed statistics summary. That is: the list of what was read yesterday from our site. Continue reading What does a “slow news day” look like at Win-Vector LLC?

Free video course: applied Bayesian A/B testing in R

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As a “thank you” to our blog, mailing list, and Twitter followers (@WinVectorLLC) we at Win-Vector LLC have decided to re-release our formerly fee-based A/B testing video course as a free (advertisement supported) video course here on Youtube.


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The course emphasizes how to design A/B tests using prior “guestimates” of effect sizes (often you have these from prior campaigns, or somebody claims an effect size and it is merely your job to confirm it). It is fairly technical, and the emphasis is Bayesian- where we are trying to get an actual estimate of the distribution unknown true expected payoff rate of the various campaigns (the so-called posteriors). We show how to design and evaluate a sales campaigns for a product at two different price points.

The solution is coded in R and Nina Zumel has contributed an updated Shiny user interface demonstrating the technique (for more on Shiny, please see here). The code for the calculation methods and older shiny app are shared here. Continue reading Free video course: applied Bayesian A/B testing in R

“Introduction to Data Science” video course contest is closed

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Congratulations to all the winners of the Win-Vector “Introduction to Data Science” Video Course giveaway! We’ve emailed all of you your individual subscription coupons. Continue reading “Introduction to Data Science” video course contest is closed

Win-Vector data science mailing list (and a give-away!)

Posted on Categories Administrativia, StatisticsTags 2 Comments on Win-Vector data science mailing list (and a give-away!)

Win-Vector LLC is starting a data science mailing list that we would like you to sign up for. It is going to be a (deliberately infrequent) set of updates including Win-Vector LLC notices, upcoming speaking events, and data science products.


To kick this off we will be awarding 5 free permanent subscriptions to our video course “Introduction to Data Science” to people who join the mailing list in January 2016 (people who have already signed up already eligible!).
(The contest is over, thank you all for entering!).

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