Welcome to the blog “Operations Research with SAS: Optimize, Simulate, Understand.” For those of you without an operations research background, a brief explanation: operations research (OR) is the study of the operations of systems, with a focus on making them function more efficiently and more effectively. The overall goal of
The Chicago weather cooperated for MWSUG 2014 with nice crisp fall temperatures, clear skies and beautiful sunrises over the lake. Aside from the weather, here are my five favorite memories of MWSUG 2014: 1. Location-location-location. The location and venue were fabulous! Not only were we along the Chicago River with a beautiful
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 required to evaluate a log-likelihood function. My algorithm used the ROOT function in SAS/IML to compute a Cholesky decomposition of the covariance matrix. The Cholesky
Getting consistent group colors across different data sets for a graph is a common topic of interest. Recently a user wrote in to ask how to ensure that specific groups "values" for a bar chart get specific colors. The group values may arrive in different order, or some may
As this article on the mythical data scientist describes, many people call this special kind of analytical talent "unicorns," because the breed can be so hard to find. In order to close the analytical talent gap that McKinsey Global Institute and others have predicted, and many of you experience today, SAS launched
Beginning with the first maintenance of SAS 9.4, you have the ability to define your own symbol markers using the SYMBOLCHAR and SYMBOLIMAGE statements. With these statements you can select a Unicode value or you can select an image file that exists on the local file system—making the possibilities for
How many times a day do you search (or “Google”) how to do something with a product, the best ways to perform “X,” or for help with a problem? Chances are it’s a lot, and when you do, you likely land on a forum where your peers have posted answers
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 Life is not the only kind of cellular automata. This article describes a system of cellular automata that is known as Wolfram's Rule 30. In
I always recommend looking at data in several different ways, to get a more complete picture of what's really going on - such is the case with the member 'ratings' on dating websites. Let's take a look at some data from a different angle... In a recent blog post, I
In 2011, the passage of the federal Justice Reinvestment Act (JRA) brought significant changes to North Carolina’s criminal sentencing practices, particularly in relation to the supervision of offenders released into the community on probation or post-release supervision. A recent New York Times article highlighted how NC has used the implementation
The Mid-West SAS Users' Group conference in Chicago was a great success, with over 400 attendees and great weather. The conference hotel was in downtown with nice view of the river and a stroll down "Magnificent Mile". The city does a great job with the flower beds down Michigan Ave., along
In this post we dig deeper into the fourth recommended practice for securing the SAS-Hadoop environment through Kerberos authentication: When configuring SAS and Hadoop jointly in a high-performance environment, ensure that all SAS servers are recognized by Kerberos. Before explaining the complex steps in connecting to secure Hadoop within a
I recently caught up with Dr. Tom Davenport, analytics thought-leader and author of Big Data @ Work, in Dublin, where we talked about big data, the Internet of Things and Hadoop. I'll be sharing the conversation here with you in two parts. You'll find part one below, and you can check
Like many strong relationships, Yoga and I did not hit it off right away. I was in college enjoying strenuous exercise. I’d run, take step, and get in some abs all in one day. I was cardio crazy. There was nothing better than heading out on the trails for a
Do you have too many models to build, too many to manage, too few analytic resources or too much data? A Model Factory may be your answer. The mindset of analytics is changing. This represents the transformation from a “craftsman” dominated culture in which multiple weeks were spent cycling through
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 you get to have all the fun?" he mock-chides. Today I'm ready to face his ribbing, because this article is about Conway's Game of Life
With Amazon Prime's 2-day shipping, I seldom go to physical stores any more. How do they deliver items so quickly? Let's analyze some data to find out... There are very few services/memberships that I truly feel like I'm getting "a good deal" for my money - and Amazon Prime is
Hello, 1992 called. They want their DDE Excel automation back. Perhaps the title of this article is too pessimistic. Of course your SAS programs that use DDE (dynamic data exchange) can still work perfectly, as long as you situate your SAS software and its DDE "partner" (usually Microsoft Excel) to
This post is a nod to one of my favourite plays, The Importance of Being Earnest by Oscar Wilde. As the title ‘Data Scientist’ becomes more common, what can we gain about the importance of titles and labelling from this century old play? For those that haven't read it, the
➤ DISCLOSURE! In June 2018 Google introduced changes to the way it handles its Maps platform. They now require API key in order to embed a map, plus Google Maps "projects" must now be associated with a billing account. Unless these new Google rules are met, Google maps described in
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 for the "tail"? The term is primarily used intuitively to mean the part of a distribution that is far from the distribution's peak or center.
SAS Enterprise Guide 7.1 began shipping last week. Of the many new features, some are "biggies" while others are more subtle. My favorite new features are those for SAS programmers, including several items that I've heard customers ask for specifically. I'll describe them briefly here; the SAS Enterprise Guide online
The rise of analytics and big data presents a once-in-a-generation opportunity for organisations to put themselves at the cutting edge, to create a competitive advantage by developing a culture of analytical success within their organisation. Yet most seem unable to grasp the opportunity that is within their reach. Eric Hoffer
I’ve written about using text analytics to capture comprehend and act on the voice of the customer on this blog before. Recently, I recorded a short presentation that outlines how text analytics provides insight from all of the customer experience data that you collect, not just review data from social
After attending the SAS Day at Texas A&M University on Oct. 2, I came away with a new perspective on some of the different educational offerings to help fill the analytic talent gap (which according to studies and research continues to grow). In essence, there is a yin and yang of
The only thing that’s constant is change. The continual cycle of computing changes leads to common questions about the effects of these changes—operating systems are getting upgraded, customers are moving to new SAS clients, upgrading to new releases of SAS, working with new Java and browser versions. All of these
What age women do men prefer on dating websites? - Let's have a look at the data... When I first started using computers in the early 80s, I thought it would be great to have everyone take a survey, and then let computers show you who your best matches were.
It usually takes more than three weeks to prepare a good impromptu speech. --Mark Twain In the popular Cryptoquote puzzle, you are presented with an enciphered version of a quote by a famous person. One of the appeals of the puzzle for me is reading the deciphered quote, such
On Thursday, October 30, 11 am ET, Aris Syntetos delivers the next installment of the Foresight/SAS Webinar Series, "Forecasting by Temporal Aggregation." Based on his article in the Summer 2014 issue of Foresight, Aris provided this preview: When we attempt to improve forecast performance we usually consider new or alternative forecasting
Today’s self-parking cars are a marvel, but that’s nothing compared to what’s just around the corner: Autonomous vehicles that can taxi you efficiently around a city, onboard navigation systems that warn of bad drivers or traffic jams nearby and offer safer, quicker alternative routes; trucks that haul commerce safely and
