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Programming Tips

Strengthen your programming skills with tips and techniques from the experts

Robert AllisonFebruary 9, 2021 0

SAS graphs for R programmers - U.S. choropleth map

This is another in my series of blogs where I take a deep dive into converting a customized R graph into a SAS ODS Graphics graph. Can you guess what data I'll be using this time? Here's a photo with a hint. This is Keeler, California (just west of Death

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Data Visualization | Programming Tips

Robert AllisonFebruary 5, 2021 0

SAS graphs for R programmers - needle plots

This is another in my series of blogs where I take a deep dive into converting a customized R graph into a SAS ODS Graphics graph. This time the example is a needle plot (that's essentially like a bar plot, with lots of tiny bars, plotted along a continuous xaxis).

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Analytics | Programming Tips

Rick WicklinFebruary 3, 2021 0

Generate random points on a sphere

In a previous article, I showed how to generate random points uniformly inside a d-dimensional sphere. In that article, I stated the following fact: If Y is drawn from the uncorrelated multivariate normal distribution, then S = Y / ||Y|| has the uniform distribution on the unit sphere. I was

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