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Data Visualization

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Rick WicklinOctober 9, 2019 0

What statistic should you use to display error bars for a mean?

In a previous article, I mentioned that the VLINE statement in PROC SGPLOT is an easy way to graph the mean response at a set of discrete time points. I mentioned that you can choose three options for the length of the "error bars": the standard deviation of the data,

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Data Visualization | Learn SAS

Rick WicklinOctober 7, 2019 0

Graph the mean response versus time in SAS

It is always great to read an old paper or blog post and think, "This task is so much easier in SAS 9.4!" I had that thought recently when I stumbled on a 2007 paper by Wei Cheng titled "Graphical Representation of Mean Measurement over Time." A substantial portion of

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Data Visualization | Programming Tips

Robert AllisonOctober 2, 2019 0

When did household air conditioning become ubiquitous in the US?

We've had record high 90+ degree temperatures here in the southeast US this past week (September / October), and it has made me appreciate having an air conditioner. Indeed, air conditioners were pretty much invented here in North Carolina (see Eric Cramer). They are used in pretty much every building

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