Author Archive

The Basics of Classifier Evaluation: Part 2

A previous blog post made the point that classifiers shouldn’t use classification accuracy as a performance metric. The next part in this series was going to discuss other evaluation techniques such as ROC curves, profit curves, and lift curves. However, there are several important points to be made first. Here I present a sequence that shows the progression and inter-relation of the issues.

Advanced Spark Meetup Recap

Our audience of engineers got right into the guts of Spark’s GraySort benchmark win last year with Chris Fregly from IBM Spark Technology Center. Here are a few highlights from the meetup.

Driving the Digital Transformation in Retail and Hospitality

This article highlights 12 initiatives centered on big data and analytics, which leading shopping mall, retail, and hospitality companies are pursuing as part of their digital transformation.