All Posts
There are people who claim that an IT expert professional with no knowledge of SAS can get the SAS Administrator job done. That's probably true. It also depends on your definition of getting the job done. At some SAS sites, it can be that the administrator's role in supporting SAS is to install it and
The other day I was constructing covariance matrices for simulating data for a mixed model with repeated measurements. I was using the SAS/IML BLOCK function to build up the "R-side" covariance matrix from smaller blocks. The matrix I was constructing was block-diagonal and looked like this: The matrix represents a
Disasters like Hurricane Sandy, by and large, shine a positive light on humanity, with the heroic actions of first responders and volunteers, and the massive outpouring of support from across the nation. They also present fraud opportunities for the shady operators and criminals among us. Hurricanes leave behind a lot
In the U.S. we have a presidential election every 4 years - and as luck would have it, 2012 is an election year! I see a lot of election maps & graphs in the news, and I'm always subconsciously critiquing them in my mind and thinking to myself, "How would I graph this
OK all you mamas and papas, and SAS users who aren’t. It’s time to turn your SAS Global Forum dreams into a reality. Registration for the 2013 event is now open. The event promises to offer no time for “Sittin’ on the Dock of the Bay” with an anticipated 400
Each spring and fall, I start clearing out the kid's small clothes, old toys, etc. It can sometimes go too far and reach into my "digital pack-rat" issues. (Wait, what does that mean? Well, just ask the person who last week requested detail on a project I worked 3 years
The North East SAS Users Group Conference (NESUG) will be held November 11-14, in Baltimore, Maryland. I’m psyched to be attending this year, and hope I’ll see you there.
In the previous post on Violin Plots, we discussed the process to create custom density plots. This work was done in collaboration with SAS user James Marcus. This is the second installment on the same topic - Creating Density Strip Plots. We will use the same data and process to compute
We all have some sort of intuitive idea of what time series data is – it’s a bunch of measurements or observations that are marked by a time stamp – we know when the measurement was taken, as well as what was measured. This natural temporal ordering of the data
As part of the Friday's Innovation Inspiration (FII) series, I've decided to present a few SAS techniques and problem solvers that you labeled as innovative or 'inspirational'. These are pretty easy to find: I've done some digging through the Best Contributed Papers. I know you haven't read them all, so
K-12 education reform and policy has seen a recent surge in the cinema with "Waiting for Superman," "The Lottery," and this fall’s "Won't Back Down.” However, if you can’t bring yourself to spend $9.00+ at the box office, or (like me) have a hard time finding babysitters to even get
You’ve just started a new job as SAS administrator, and there’s no documentation. How do you know which SAS products are installed? Where they are deployed? Where do the data and programs reside? Brian Varney tells us that SAS administrators often run into undocumented environments whenever they begin working in a new
The determinant of a matrix arises in many statistical computations, such as in estimating parameters that fit a distribution to multivariate data. For example, if you are using a log-likelihood function to fit a multivariate normal distribution, the formula for the log-likelihood involves the expression log(det(Σ)), where Σ is the
Over the past month or more, I have been in a conversation with SAS user James Marcus, on creation of some new displays for visual communication of uncertainty. These include display of densities using a "Violin" plot, "Density Strips" and more. With his permission, I can share some of the
I work on a variety of projects at SAS, most of which require some level of team collaboration in source management systems. Due to the many technologies that we work with, SAS developers use different source management tools for different purposes. I've got projects in CVS, Subversion, and Git. When