michaelmalak's blog

Insights of four Colorado Big Data experts

I just returned from the January, 2014 Meetup of the Boulder/Denver Big Data Meetup group. They stumbled into an amazing format. When they had to postpone their original speaker for a few months, they arranged with four execs, engineers and data scientists from Boulder and Denver companies involved in Big Data and Data Science to each give a 20 minute presentation, followed by a 20 minute roundtable.

Corrgram: Multi-variate visualization

Corrgrams, invented and coined by Michael Friendly in his 2002 American Statistician paper are a powerful and rapid way to visualize a dozen or more dimensions simultaneously when in the exploratory phase of multi-variate analysis. (Note that Corrgrams are sometimes erroneously referred to as Correlograms, which are something completely different for time series analysis.)

Real-time data science

Looking back on 2013, the world of Hadoop emerged from the era of batch processing and into streaming processing. In the context of "crisp and actionable," actionable often comes with an expiration date. If you don't take action soon enough, it's too late.