About this blog
Rick Wicklin, PhD, is a senior researcher in computational statistics at SAS and is a principal developer of PROC IML and SAS/IML Studio. His areas of expertise include computational statistics, statistical graphics, statistical simulation, and modern methods in statistical data analysis. Rick is author of the books Statistical Programming with SAS/IML Software and Simulating Data with SAS.
Follow @RickWicklin on Twitter.
Rick Wicklin
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Research Statistician Developer
Rick Wicklin, PhD, is a senior researcher in computational statistics at SAS and is a principal developer of PROC IML and SAS/IML Studio. His areas of expertise include computational statistics, statistical graphics, and modern methods in statistical data analysis. Rick is author of the books Statistical Programming with SAS/IML Software and Simulating Data with SAS. Follow @RickWicklin on Twitter.
Recent Posts
Use regression for a univariate analysis? Yes!
I've conducted a lot of univariate analyses in SAS, yet I'm always surprised when the best way to carry out the analysis uses a SAS ... Read More
A three-panel visualization of a distribution
At a recent conference, I talked with a SAS customer who told me that he was using an R package to create a three-panel visualization ... Read More
Compute confidence intervals for percentiles in SAS
PROC UNIVARIATE has provided confidence intervals for standard percentiles (quartiles) for eons. However, in SAS 9.3M2 (featuring the 12.1 analytical procedures) you can use a ... Read More
Understanding local and global variables in the SAS/IML language
The TV show Cheers was set in a bar "where everybody knows your name." Global knowledge of a name is appealing for a neighborhood pub, ... Read More
The new book on my desk
In my constant effort to keep pace with Chris Hemedinger, I am pleased to announce the availability of my new book, Simulating Data with SAS. ... Read More
How to overlay a custom density curve on a histogram in SAS
I've previously described how to overlay two or more density curves on a single plot. I've also written about how to use PROC SGPLOT to ... Read More
How to overlay custom curves with PROC SGPLOT
I recently showed someone a trick to create a graph, and he was extremely pleased to learn it. The trick is well known to many ... Read More
Quantile regression: Better than connecting the sample quantiles of binned data
I often see variations of the following question posted on statistical discussion forums: I want to bin the X variable into a small number of ... Read More
The role of statistics in the top public health achievements of the 20th century
In this International Year of Statistics, I'd like to describe the major role of statistics in public health advances. In our modern society, it is ... Read More
How to vectorize computations in a matrix language