How to learn from The Dream Team of experts at Analytics Experience 2017…even if you’re not going

September 14, 2017
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You might not know it by looking at me (I’m rounding up when I tell people I’m 5’8”) but I’m a huge basketball fan. I’ve been following the sport since I was 10, coaching it for the last decade and playing on teams throughout my life, still dedicating my winters

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Simulate multivariate clusters in SAS

September 13, 2017
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This article shows how to simulate data from a mixture of multivariate normal distributions, which is also called a Gaussian mixture. You can use this simulation to generate clustered data. The adjacent graph shows three clusters, each simulated from a four-dimensional normal distribution. Each cluster has its own within-cluster covariance,

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Where do hurricanes strike Florida? (110 years of data)

September 12, 2017
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With Hurricane Irma recently pummeling pretty much the entire state of Florida, I got to wondering where past hurricanes have hit the state. Let's get some data, and figure out how to best analyze it using SAS software! I did a bit of web searching, an...
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Algorithmic pricing with Redis

September 12, 2017
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Algorithmic pricing with Redis


The algorithmic pricing is an exciting new area, and it combines engineering and mathematics. Chen’s paper has introduced the algorithmic pricing on Amazon Marketplace. This post is to discuss the implementation of an algorithmic pricing based on Redis from the perspective of the sellers.

The background

INSET in Proc SGPLOT

September 11, 2017
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INSET "Mean of the best percent change = &pmean." / position = bottomleft;Example: Click Here and Here
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Symbolic derivatives in SAS

September 11, 2017
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Did you know that you can get SAS to compute symbolic (analytical) derivatives of simple functions, including applying the product rule, quotient rule, and chain rule? SAS can form the symbolic derivatives of single-variable functions and partial derivatives of multivariable functions. Furthermore, the derivatives are output in a form that

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Using FILENAME ZIP and FINFO to list the details in your ZIP files

September 8, 2017
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It's time to share another tip about working with ZIP files in SAS. Since I first wrote about FILENAME ZIP to list and extract files from a ZIP archive, readers have been asking for more. Specifically, they want additional details about the files that are contained in a ZIP, including

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What cities are in Hurricane Irma’s path?

September 8, 2017
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As Hurricane Irma makes its way through the Caribbean, and heads towards the United States, the big question on everyone's mind ... is the hurricane going to hit my city? Or, as some people like to say, "should I buy milk & bread?" Let's analyze & map some data to

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How rare are Category 5 hurricanes?

September 7, 2017
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I suppose we've all been watching Hurricane Irma rip through the Caribbean like a giant buzzsaw blade, with wind speeds over 180mph. This is one of those rare Category 5 storms. But just how rare are Category 5 hurricanes? According to the Wikipedia page, hurricanes with wind speeds >=157mph are

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