My friend Chris posted an analysis of the distribution of birthdays for 236 of his Facebook friends. He noted that more of his friends have birthdays in April than in September. The numbers were 28 for April, but only 25 for September. As I reported in my post on "the
The downturn in the economy beginning in 2008 and continuing even to now has put tremendous pressure on local governments to do “less with less”. In the past when economic downturns caused service level cut backs the cry was to do “more with less”. The idea was to identify ways
Windows PowerShell is one of my favorite tools to use for gathering information from my PC and network, and also for automating processes. If you are familiar with UNIX shells (such as Korn shell or its variants), you will probably be very comfortable with Windows PowerShell. Just like its UNIX
You can extend the capability of the SAS/IML language by writing modules. A module is a user-defined function. You can define a module by using the START and FINISH statements. Many people, including myself, define modules at the top of the SAS/IML program in which they are used. You can
Earlier today, Rick posted interesting information about which time of year the most babies are born, at least in the USA. I don't have data nearly as extensive as what's available at the NCHS, but I do have a sample of birthday records to compare against Rick's findings. My sample
Do you know someone who has a birthday in mid-September? Odds are that you do: the middle of September is when most US babies are born, according to data obtained from the National Center for Health Statistics (NCHS) Web site (see Table 1-16). There's an easy way to remember this
For years mathematicians have been pondering the Monty Hall Problem – you know, the old TV show where you have 3 doors and behind one door is a car (or some nice prize) and behind the other two doors are goats (or some undesirable prize). You pick door #1. But
I use Google Reader to keep up with SAS-related conversations on the blogosphere. I thought it would be nice to share the lists of blogs that I follow as "shared bundles". If you also use Google Reader, it will be very easy for you to add these bundles to
‘Context’ defined (as cited from the Merriam-Webster Online Dictionary): 1: the parts of a discourse that surround a word or passage and can throw light on its meaning; and, 2: the interrelated conditions in which something exists or occurs: environment, setting. While context is clearly important, today it is consistently
Looping is essential to statistical programming. Whether you need to iterate over parameters in an algorithm or indices in an array, a loop is often one of the first programming constructs that a beginning programmer learns. Today is the first anniversary of this blog, which is named The DO Loop,
In Part 1, Udo provided SAS code to replicate the example in Hyndman's blog. Below, he shows the results of out-of-sample testing, and draws some conclusions on the computational efficiency of this approach. Out-of-sample Testing In addition to the example shared by Hyndman, out-of-sample data was used to illustrate the final performance
We ship many sample data sets with SAS products. By using well-understood sample data sets, we can teach concepts or show off product features without distracting the audience/students with data collection or prep. At least, that's the way it's supposed to work. But occasionally the sample data can cause a
In this guest blogger post, Udo Sglavo of the Advanced Analytics Division of SAS shows how to conduct time series cross-validation using SAS Forecast Server. Udo replicates the example from Rob J Hyndman's Research Tips blog. Replicating the Example In order to replicate the example in Hyndman's blog, the example
My elderly mother enjoys playing Scrabble®. The only problem is that my father and most of my siblings won't play with her because she beats them all the time! Consequently, my mother is always excited when I visit because I'll play a few Scrabble games with her. During a recent
It's been a well-known limitation for a long time. When you connect to a SAS session using SAS Enterprise Guide, shell commands (including X command, SYSTASK, and FILENAME PIPE) are off-limits because the default SAS invocation disables them. It does this by including -NOXCMD as a command-line option. This makes
Hurricane Irene impacted 20% of the US population and will cost billions in recovery dollars. Now that the water has begun to subside, the real long term work begins. And it is this work that can be another disaster, or, a real economic benefit to a state. How so? FEMA
The hurricane didn't get me, but Monday night's thunderstorm sure played a dirty trick. After leaving my car windows cracked open over night, I drove to work Tuesday morning feeling a little soggier by the minute. Upon arrival at SAS, I was aghast to find the seat of my pants was soaked
I recently attended the Medicaid Management Information System (MMIS) Conference in Austin, Texas. The MMIS conference is an annual event for federal and state HHS agencies to share programmatic and technology initiatives in Medicaid and Children’s Health Insurance Programs (CHIP). While I have attended numerous MMIS conferences in the past, I
I previously showed how to generate random numbers in SAS by using the RAND function in the DATA step or by using the RANDGEN subroutine in SAS/IML software. These functions generate a stream of random numbers. (In statistics, the random numbers are usually a sample from a distribution such as
You’ve gotten to know Stacey Hamilton; now it’s time to learn more about SAS Press acquisitions editor John West! John West typically works on programming and statistics titles and has been with SAS Publishing for 22 years: He started at SAS as a proofreader, then moved into technical editing where
At least, that's according to my colleague, Rick Wicklin. In a recent blog post, Rick points out that estimating popularity based on results of Google searches is a bad idea. Well, that just disqualified my claim that PROC REPORT is more popular than PROC TABULATE, as measured via a GoogleFight.
While talking to SAS users in Australia earlier this month, I often demonstrated the capabilities of the new Map Chart task in SAS Enterprise Guide 4.3. Creating map charts has never been easier: select your map data source, then select your response data source, and click Run. Voila! You've got
Was the SAS Insight Series in New Zealand and Australia a prelude to the Rugby World Cup? Perhaps it was, even if you cannot find it on the list of official events. But consider these coincidences: Like the Rugby World Cup, my trip was also sponsored by MasterCard. (Okay...not
One of the highly visible changes in SAS 9.3 is the fact that the old LISTING destination is no longer the default destination for ODS output. Instead, the HTML destination is the default. One positive consequence of this is that ODS graphics and tables are interlaced in the output. Another
This week's SAS author's tip comes from a large green book that many of you are familiar with: A Step-by-Step Approach to Using SAS for Univariate & Multivariate Statistics, Second Edition by Norm O'Rourke, Larry Hatcher, and Edward J. Stepanski. Despite its massive size, this isn't an intimidating text. The authors ease you
Exploring correlation between variables is an important part of exploratory data analysis. Before you start to model data, it is a good idea to visualize how variables related to one another. Zach Mayer, on his Modern Toolmaking blog, posted code that shows how to display and visualize correlations in R.
We had a tornado in April, an earthquake on Tuesday, a drought all summer, and a hurricane arrives on Saturday. All I can figure is that Cary, NC has way too many sinners per capita. What's next -- pestilence? The BFD Makeover The BFD (and all SAS blogs) will now be
The recent budget debate between President Obama and Congress reminded me of many of the discussions I observed during my years as State Controller and Deputy State Budget Officer in North Carolina. These discussions are related specifically to principles adhered to in budget development and budget deliberations by elected officials.
You can generate a set of random numbers in SAS that are uniformly distributed by using the RAND function in the DATA step or by using the RANDGEN subroutine in SAS/IML software. (These same functions also generate random numbers from other common distributions such as binomial and normal.) The syntax
The highway system traversing the United States quietly hit a milestone last month with the 55th anniversary of the Federal Aid Highway Act. In 1956 President Eisenhower had a vision for our nation’s infrastructure; he knew that building an interstate highway system was vital, and expressed that “Together, the united
