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Data Science: Street Fighting Statistics

I am excited to share my guest lecture for Department of Statistics at the University of Illinois STAT 447: Data Science Programming Methods. And thank you to Dirk Eddelbuettel for inviting me! The talk was titled “Data Science: Street Fighting Statistics” and demonstrates two simple supervised modeling tasks in R. […]

Y-Aware PCA

We have had some trouble with some articles being damaged or hard to access in the Win Vector blog. I (John Mount) do want to apologize for that. In particular the graphs are missing for Dr. Nina Zumel’s wonderful y-aware Pricipal Components regression series. The complete R .md and .Rmd […]

Method Warnings

Introduction The data algebra is a Python system for designing data transformations that can be used in Pandas or SQL. The new 1.3.0 version introduces a lot of early checking and warnings to make designing data transforms more convenient and safer. An Example I’d like to demonstrate some of these […]

How to Re-Map Many Columns in a Database

Introduction A surprisingly tricky problem in doing data science or analytics in the database are situations where one has to re-map a large number of columns. This occurs, for example, in the vtreat data preparation system. In the vtreat case, a large number of the variable encodings reduce to table-lookup […]