Rick Wicklin
Rick Wicklin RSS
Research Statistician Developer

Rick Wicklin, PhD, is a distinguished 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

Sum a series in SAS

A customer asked: How do we go about summing a finite series in SAS? For example, I want to compute for various integers n ≥ ... Read More

Create a waterfall plot in SAS

In clinical trials, a waterfall plot is often used to indicate how patients in the study responded to treatment. In oncology trials, the response variable ... Read More

The distribution of Pythagorean triples by angle

Last week I was chatting with some mathematicians and I mentioned the blog post that I wrote last year on the distribution of Pythagorean triples. ... Read More

DO loop = 1 TO 600;

Today is my 600th blog post for The DO Loop. I have written about many topics that are related to statistical programming, math, statistics, simulation, ... Read More

Compute the rank of a matrix in SAS

A common question from statistical programmers is how to compute the rank of a matrix in SAS. Recall that the rank of a matrix is ... Read More

Let's talk at SAS Global Forum 2015

The 2015 SAS Global Forum is in Dallas, TX, and I'll be there. There are many talks to see and people to meet, so thank ... Read More

Simulate the Monty Hall Problem in SAS

The Monty Hall Problem is one of the most famous problems in elementary probability. It is famous because the correct solution is counter-intuitive and because ... Read More

Visualizing the causes of airline crashes

There has been a spate of recent high-profile airline crashes (Malaysia Airlines, TransAsia Airways, Germanwings,...) so I was surprised when I saw a time series ... Read More

On the number of permutations supported in SAS software

There's "big," and then there is "factorial big." If you have k items, the number of permutations is "k factorial," which is written as k!. ... Read More

Vectors that have a fractional number of elements

The title of this article makes no sense. How can the number of elements (in fact, the number of anything!) not be a whole number? ... Read More