R | Harlan D. Harris

intuitive visualizations of categorization for non-technical audiences

Apr 25, 2011 · 8 min read · analytics dataviz ggplot2 graphics predictive R visualization statistics ·

For a project I’m working on at work, I’m building a predictive model that categorizes something (I can’t tell you what) into two bins. There is a default bin that 95% of the things belong to and a bin that the business cares a lot about, containing 5% of the things. Some readers may be familiar with the use of …

how to speak ggplot2 like a native, and Predictive Analytics World

Oct 24, 2010 · 2 min read · ggplot2 meetup R ·

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I was recently given the opportunity to re-present my ggplot2 talk, which I originally gave to the NYC R Meetup, to the DC R Meetup group. The Meetup was held co-located with the Predictive Analytics World conference in Alexandria, VA. (More on my thoughts on PAW below…) Contentwise, I made only small changes, changing …

Prediction with Multilevel Regression Models, and Pizza

Oct 15, 2010 · 3 min read · meetup statistics R ·

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The Meetup phenomenon, which is now substantial and longstanding enough to be more of a cultural change than a flash in the pan, continues to impress me. Even more so than tools like LinkedIn, Meetups have changed the nature of professional networking, making it more informal, diverse, and decentralized. Last night, …

ggplot and concepts -- what's right, and what's wrong

Mar 7, 2010 · 6 min read · ggplot2 graphics programming R ·

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A few months back I gave a presentation to the NYC R Meetup. (R is a statistical programming language. If this means nothing to you, feel free to stop reading now.) The presentation was on ggplot2, a popular package for generating graphs of data and statistics. In the talk (which you can see here, including both my …