Einmal pro Monat fassen wir ab jetzt Studien, Videos und Veröffentlichungen über Big Data, Business Analytics und Datenvisualisierung für Sie zusammen. Das Wichtigste über den Umgang mit Daten in Unternehmen und datenbasierte Entscheidungen - im Web gefunden, zusammengetragen und ausgewählt von führenden Analysten, unseren Partnern und SAS-Experten. Zur aktuellen Ausgabe: "The
A SAS user told me that he computed a vector of values in the SAS/IML language and wanted to use those values on a statement in a SAS procedure. The particular application involved wanting to use the values on the ESTIMATE and CONTRAST statements in a SAS regression procedure, but
Die Big Data-Diskussion hat vielen Unternehmen vor Augen geführt, dass Daten mittlerweile zu einem wichtigen Produktionsfaktor geworden sind. Ohne eine gezielte und konsequente Strategie lässt sich der Wert, der in den Daten steckt, nicht heben. Gefragt sind methodische und organisatorische Weichenstellungen – unterstützt von Software, die den Brückenschlag zwischen Fachbereich
This week's SAS tip is from Gerhard Svolba and his latest book Data Quality for Analytics Using SAS. For additional bonus book content and to learn more about Gerhard and his work, visit his author page. The following excerpt is from SAS Press author Gerhard Svolba's book "Data Quality for Analytics Using SAS"
They say "Imitation is the most sincere form of flattery"... Therefore when I imitate Hans Rosling's famous world-data animation, it's not that I'm jealous, but that I'm paying homage to him! (OK, and maybe also a little bit jealous! LOL) Well, anyway, for those of you who haven't seen it,
The power of a statistical test measures the test's ability to detect a specific alternate hypothesis. For example, educational researchers might want to compare the mean scores of boys and girls on a standardized test. They plan to use the well-known two-sample t test. The null hypothesis is that the
Last time we saw two situations where you wouldn't bother trying to improve your forecast: When forecast accuracy is "good enough" and is not constraining organizational performance. When the costs and consequences of a less-than-perfect forecast are low. (Another situation was brought to my attention by Sean Schubert of
If you write a blog, you deal with spam comments. That's just part of the deal. Spammers are forever inventing new and creative methods for "tricking" you into accepting their spam comments. These comments have nothing to do with your blog topic but do contain trackback links to their own
Has anyone noticed that the REG procedure in SAS/STAT 12.1 produces heat maps instead of scatter plots for fit plots and residual plots when the regression involves more than 5,000 observations? I wasn't aware of the change until a colleague informed me, although the change is discussed in the "Details"
If the popularity of one's blog can be measured by the number of comments received, then The BFD has become quite popular. Many of the comments are quite flattering, such as: Hello, I check your blog like еvery week. Үour writing style is wittу, keep doing ωhat you're doing! Vеry
Dylan Jones (@dataqualitypro) shares an example of why data quality should be a business-as-usual practice.
In my article "Simulation in SAS: The slow way or the BY way," I showed how to use BY-group processing rather than a macro loop in order to efficiently analyze simulated data with SAS. In the example, I analyzed the simulated data by using PROC MEANS, and I use the
I recently read an interesting article in The Economist, where they describe "The Big Mac index." This is an index they invented as a lighthearted guide to compare currencies in different countries. In their article they create a multi-panel display (similar to a dashboard) where they compare the index for several countries using
Last week I discussed a program that had three nested loops that used scalar operations in the innermost loop. I mentioned that this program was not vectorized, and would therefore be slow in a matrix language such as SAS/IML, MATLAB, or R. I then went through a series of steps
Last week I alluded to some very useful applications of the Copy Files task. This is one of them. If you have SAS Enterprise Guide 7.13 or later, the Copy Files task is in the Tasks->Data menu. In earlier versions, you'll have to download/install the task as a custom task.
For programmers who are learning the SAS/IML language, it is sometimes confusing that there are two kinds of multiplication operators, whereas in the SAS DATA step there is only scalar multiplication. This article describes the multiplication operators in the SAS/IML language and how to use them to perform common tasks
Recent versions of SAS Enterprise Guide (version 5.1 and later) use Microsoft .NET 4.0, which enforces additional security requirements before running custom task DLLs that you download from the Web, including those that you download from support.sas.com. Because these task DLLs are downloaded from the (big and scary) Internet, the
Students with missing test scores are often highly mobile students and are more likely to be low-achieving students. It is important to include these students in any growth/value-added model to avoid selection bias, which could provide misleading growth estimates to districts, schools and teachers that serve higher populations of these
A few months ago I released the Copy Files task for use with SAS Enterprise Guide. The task allows you to transfer any files between your PC and a SAS Workspace session, much like an FTP process. It doesn't rely on FTP though; it uses a combination of SAS code,
Are you an NFL fan, or curious about analyzing social media data? -- Well, in either case, this blog's for you! I recently read a fascinating Facebook article that included a U.S. county map showing which NFL (U.S. football) team had the most 'likes' in each county (based on ~35 million
We’re just coming back from SAS Global Forum, and what a show! SAS Books was there to provide users with the highest-quality resources for learning SAS, and our users were there to tell us what new books they were most looking forward to reading. Kevin Smith's PROC TEMPLATE Made Easy:
Last week someone posted an interesting question to the SAS/IML Support Community. The problem involved four nested DO loops and took hours to run. By transforming several nested DO loops into an equivalent matrix operation, I was able to reduce the run time to about one second. The process of
I've conducted a lot of univariate analyses in SAS, yet I'm always surprised when the best way to carry out the analysis uses a SAS regression procedure. I always think, "This is a univariate analysis! Why am I using a regression procedure? Doesn't a regression require at least two variables?"
At a recent conference, I talked with a SAS customer who told me that he was using an R package to create a three-panel visualization of a distribution. Unfortunately, he couldn't remember the name of the package, and he has not returned my e-mails, so the purpose of today's article
Even though it's been around for well over a decade, SAS Enterprise Guide was still a hot topic among attendees at SAS Global Forum this year. In the Technology Connection -- the big session on Monday morning -- SAS R&D staff used the conference agenda content to demonstrate the power
David Loshin (@davidloshin) discusses the importance of social media analytics.
"Why Should I Trust Your Forecasts?" now available on-demand The SAS / Foresight webinar series had a rousing kickoff on April 24, with Paul Goodwin asking (and answering) the question, "Why Should I Trust Your Forecasts?" The webinar is now available for free on-demand review . Be sure to stick
Editor Len Tashman's Preview of Foresight For a look at articles in the Spring issue of Foresight: The International Journal of Applied Forecasting, here is editor Len Tashman's preview: Kevin Foley is an IIF–Certified Forecaster with over 15 years of consultant experience in defense and aerospace companies. Drawing on this
PROC UNIVARIATE has provided confidence intervals for standard percentiles (quartiles) for eons. However, in SAS 9.3M2 (featuring the 12.1 analytical procedures) you can use a new feature in PROC UNIVARIATE to compute confidence intervals for a specified list of percentiles. To be clear, percentiles and quantiles are essentially the same
