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
Just got some time to begin playing with the 9.3 Enterprise Business Intelligence installation on my SAS laptop. As I was testing out the web applications, SASWebDoc opened but I couldn't get to the SAS login screen up to access the SAS Stored Process web application. First I started perusing my
NOTE: SAS stopped shipping the SAS/IML Studio interface in 2018. It is no longer supported, so this article is no longer relevant. When I write SAS/IML programs, I usually do my development in the SAS/IML Studio environment. Why? There are many reasons, but the one that I will discuss today
Creating shared prompts to use across the various BI clients requires the use of SAS Management Console's stored process wizard. Editing these prompts after they have been shared requires some forethought. The important thing to consider when making any changes to a prompt's properties is the impact these changes could
Some people search the Internet for a set of topics and then use the number of search results ("hits") for each topic to rank the relative popularity of the topics. At the 2011 Joint Statistical Meetings (JSM), I had the opportunity to attend several talks by statisticians from Google and
The new, third edition of Frederick Pratter’s Web Development with SAS by Example recently came out to great fanfare. Updated for SAS 9.2 and SAS Enterprise BI Server 4.3, Web Development with SAS by Example, Third Edition, introduces readers to Web programming using real-world examples and SAS Web programming tools. So
I've previously described ways to solve systems of linear equations, A*b = c. While discussing the relative merits of the solving a system for a particular right hand side versus solving for the inverse matrix, I made the assertion that it is faster to solve a particular system than it
I'm currently enjoying the Australian "winter" as I travel around the region talking to SAS customers for the SAS Insight Series. It just so happens that I was in Perth, Western Australia for Australia's Census Night. Because I was in the country on this special day, I was compelled
This week’s featured SAS author’s tip comes from SAS user extraordinaire Ron Cody. Honestly, because Ron has written so many SAS books, I could probably feature a year’s worth of tips from his work alone. To find something useful in any of Ron’s books, one merely needs to let the
In order to support a SAS Server Architecture, administrators must know where all the log files from the various SAS Business Intelligence services are located. By default, each service that generates a log will create it within the services' own configuration folder structure. For example, the metadata server log is
