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, simulation, 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

Rolling statistics in SAS/IML

Last week I showed how to use PROC EXPAND to compute moving averages and other rolling statistics in SAS. ... Read More

Group processing in SAS: The NOTSORTED option

Novice SAS programmers quickly learn the advantages of using PROC SORT to sort data, followed by a BY-group analysis ... Read More

Compute a moving average in SAS

A common question on SAS discussion forums is how to compute a moving average in SAS. This article shows how ... Read More

What is a moving average?

A moving average (also called a rolling average) is a statistical technique that is used to smooth a time ... Read More

Banking to 45 degrees: Aspect ratios for time series plots

In SAS, the aspect ratio of a graph is the physical height of the graph divided by the physical ... Read More

Create a SAS macro variable that contains a list of values

Parameters in SAS procedures are specified a list of values that you manually type into the procedure syntax. For ... Read More

Compute the centroid of a polygon in SAS

Recently I blogged about how to compute a weighted mean and showed that you can use a weighted mean ... Read More

Twelve posts from 2015 that deserve a second look

I began 2016 by compiling a list of popular articles from my blog in 2015. This "People's Choice" list ... Read More

Compute a weighted mean in SAS

Weighted averages are all around us. Teachers use weighted averages to assign a test more weight than a quiz. ... Read More

Popular posts from The DO Loop in 2015

I wrote 114 posts for The DO Loop blog in 2015. Which were the most popular with readers? In ... Read More