Beer, diapers and heat map

Sanjay Matange
Sanjay Matange|February 13, 2012

The parable of beer and diapers is often related when teaching data mining techniques.  Whether fact or fiction, a Heat Map is useful to view the claimed associations.  A co-worker recently enquired about possible ways to display associations or dependency between variables.  One option is to show the dependency as a node [...]

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Secrets of statistical graphics procedures revealed

Sanjay Matange
Sanjay Matange|December 15, 2011

A new book from SAS Press, “Statistical Graphics Procedures by Example” co-authored by Dan Heath and I has now been published (phew!).  For both Dan and I, this was our first foray into writing a book, so it was highly educational to say the least. The key idea behind the presentation [...]

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Adding a spark to your data

Sanjay Matange
Sanjay Matange|December 6, 2011

When viewing time series data, often we only want to see the trend in the data over time and we are not so concerned about the actual data values.  With multiple time series plots, forecasting software can find clusters to help us view series with similar trends. Recently I saw a graph showing the trend of unemployment [...]

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