Counting observations for which two events occur

October 31, 2016
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Counting observations for which two events occur

Every year near Halloween I write an article in which I demonstrate a simple programming trick that is a real treat to use. This year's trick (which features the CMISS function and the crossproducts matrix in SAS/IML) enables you to count the number of observations that are missing for pairs

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How to scare up a few good graphs for Halloween

October 27, 2016
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Halloween appears be my favorite holiday, because I seem to have more graphs related to it than any of the others. And since Halloween is just a few days away, I thought you might like an easy way to see all those graphs. Here's are links to my previous Halloween-related blog posts, containing

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Create patterns of missing data

October 26, 2016
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Create patterns of missing data

When simulating data or testing algorithms, it is useful to be able to generate patterns of missing data. This article shows how to generate random and systematic patterns of missing values. In other words, this article shows how to replace nonmissing data with missing data. Generate a random pattern of

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What comes shipped free with Base SAS 9.4?

October 25, 2016
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Like unexpectedly seeing this beautiful bird in nature, SAS has tons of free goodies you might be surprised to encounter as you explore your software. While individual organizations may have separate permutations and combinations of SAS software, I’d like to share the list of freebies that comes with a simple

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The perfect storm for State Fair attendance!

October 25, 2016
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The State Fair in North Carolina is just a few miles from SAS headquarters, and therefore it's virtually impossible for it to slip by without me noticing it. There are two aspects of the fair that usually get lots of news coverage - what's the latest fair-food, and did we

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New features in SAS Enterprise Guide 7.1

October 25, 2016
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SAS Enterprise Guide has come a long way since version 1.0 was released in 1999! Are any of you original users that remember the Help characters, Clippy, Peedy or Merlin?  I was working as a statistician for another company that year, and I attended a SAS user group meeting where

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How much does it cost to live to 100?

October 24, 2016
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Living to 100 isn't as simple as just paying a certain amount of money for your healthcare. But that is an interesting aspect of longevity, so let's have a look at the data ... In my previous blog post, we analyzed how much people from various countries spend on healthcare.

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Ahh, that’s smooth! Anti-aliasing in SAS statistical graphics

October 24, 2016
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Ahh, that’s smooth! Anti-aliasing in SAS statistical graphics

I've written several articles about scatter plot smoothers: nonparametric regression curves that reveal small- and large-scale features of a response variable as a function of an explanatory variable. However, there is another kind of "smoothness" that you might care about, and that is the apparent smoothness of curves and markers

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Which SAS course should I choose?

October 20, 2016
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As an instructor for SAS, I receive a wide variety of queries before, during and after delivering my courses. Most frequently, I am asked questions such as: Should I learn SAS programming or a point and click tool instead? I know lots of code, should I go straight to the

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