Rick Wicklin
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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

Does this kurtosis make my tail look fat?

What is kurtosis? What does negative or positive kurtosis mean, and why should you care? How do you compute kurtosis in SAS software? It is ... Read More

Compute the log-determinant of an arbitrary matrix

A few years ago I wrote an article that shows how to compute the log-determinant of a covariance matrix in SAS. This computation is often ... Read More

Wolfram's Rule 30 in SAS

My previous blog post describes how to implement Conway's Game of Life by using the dynamically linked graphics in SAS/IML Studio. But the Game of ... Read More

Cellular automata and the Game of Life in SAS

A colleague jokingly teases me whenever I write a blog that demonstrates how to write fun and exciting programs by using SAS software. "Why do ... Read More

Fat-tailed and long-tailed distributions

The tail of a probability distribution is an important notion in probability and statistics, but did you know that there is not a rigorous definition ... Read More

The frequency of double-letters in Cryptoquotes

It usually takes more than three weeks to prepare a good impromptu speech.        --Mark Twain In the popular Cryptoquote puzzle, you are presented with ... Read More

The name of a parameter in the parent environment

SAS/IML 13.1 includes a handy function for programmers who write a lot of modules. The PARENTNAME function obtains the name of the symbol that was ... Read More

Convert hexadecimal colors to RGB

In response to my recent post about how to use the PALETTE function in SAS/IML to generate color ramps, a reader wrote the following: The ... Read More

Which double letters appear most frequently in English text?

Double, double toil and trouble; Fire burn, and caldron bubble.     Macbeth, Act IV, Scene I For the cyptanalyst or recreational puzzle solver, "double double" does ... Read More

How to choose colors for maps and heat maps

Have you ever looked as a statistical graph that uses bright garish colors and thought, "Why in the world did that guy choose those awful ... Read More