With the pervasiveness of mobile devices, being able to read while “on the go” has been easier than ever. How many times have you found yourself in a situation where you pass the time waiting by reading something on your phone/iPad/tablet etc? With eBooks on my iPad, I find that
Stellen Sie sich vor, Sie sind der CEO eines weltweit operierenden Unternehmens und finden in einem Benchmark heraus, dass Ihre Wettbewerber stärker wachsen als Sie. Deshalb starten Sie eine Analytics-Strategie, stellen einen Datenanalysten an, nennen ihn Data Scientist (so heißt das nämlich heute) und bitten ihn, analytisch optimierte Marketingkampagnen zu
This article describes how to generate random samples from the multinomial distribution in SAS. The content is taken from Chapter 8 of my book Simulating Data with SAS. The multinomial distribution is a discrete multivariate distribution. Suppose there are k different types of items in a box, such as a
While I've long advocated the use of Coefficient of Variation (CV) as a quick and dirty indicator of the forecastability of a time-series, its deficiencies are well recognized. It is true that any series with extremely low CV can be forecast quite accurately (using a moving average or simple exponential smoothing
With the release of SAS 9.4 (which included SAS/STAT 12.3 and SAS Enterprise Guide 6.1), you might seriously consider hiring a Chief Versions Officer (CVO). Fortunately, most of the recent versions of SAS Enterprise Guide work with the different recent versions of SAS, so you have some flexibility as you
Im fortschreitende Modernisierungsprozess befindet sich die öffentliche Hand im Spannungsfeld zwischen knappen Kassen und demografischem Wandel einerseits und Forderungen nach einer wirkungsorientierten und bürgernahen Auftragserfüllung andererseits. Die zunehmende Komplexität der fachlichen Zusammenhänge innerhalb einzelner Politikfelder und der Abhängigkeiten zwischen verschiedenen Bereichen bindet zusätzliche Ressourcen. Mehr und mehr fordert die Politik
How old is your version of SAS software? The graph on the left shows the release dates for various releases of SAS software, beginning with SAS 8.0. The graph is based on a graph on Jiangtang Hu's blog that shows the major SAS releases. As this graph demonstrates, SAS software
"Forecastability" is a frequent topic of discussion on The BFD, and an essential consideration when evaluating the effectiveness of any forecasting process. A major critique of forecasting benchmarks is that they fail to take forecastability into consideration: An organization with "best in class" forecast accuracy may do so only because
Previously I've described how you can use SAS Enterprise Guide to send an e-mail message using Gmail as your e-mail provider. In the article, I mentioned that you can also write SAS programs that send e-mail messages, but at the time you could not reach Gmail using the FILENAME EMAIL
Seit 37 Jahren liefert SAS Innovationen im Bereich Analytics. Alle zwei bis drei Jahre stehen größere Renovierungen in der Plattform ins Haus - und dieses Jahr ist es wieder soweit. SAS verschafft der Unternehmens-IT mit der neuen Version seiner Business-Analytics-Plattform SAS 9.4 eine neue Basis für analytische Anwendungen. Grundlage hierfür
Do you have dozens (or even hundreds) of SAS data sets that you want to read into SAS/IML matrices? In a previous blog post, I showed how to iterate over a series of data sets and analyze each one. Inside the loop, I read each data set into a matrix
Agile Business Intelligence ist aktuell in aller Munde. Ziel ist stets, Anforderungen des Fachbereiches schneller zu erfüllen, als dies mit herkömmlichen Entwicklungsverfahren möglich erscheint. Was jedoch unter agiler BI zu verstehen ist und wie sich diese Verfahren von den im Data Warehousing etablierten Vorgehensweisen unterscheiden, darüber herrscht im Markt wenig
From an Enterprise Guide user's perspective, a SAS library is a library. Whether it was defined in the autoexec or in the metadata or by magic, it is there for them to use with no issues. However, there is a difference as metadata defined libraries do not behave in the
One of my favorite features of SAS/IML 12.1 (released with 9.3m2) is that the USE and CLOSE statements support reading data set names that are specified in a SAS/IML matrix. The IMLPlus language in SAS/IML Studio has supported this syntax since the early 2000s, so I am pleased that this
The truncated normal distribution TN(μ, σ, a, b) is the distribution of a normal random variable with mean μ and standard deviation σ that is truncated on the interval [a, b]. I previously blogged about how to implement the truncated normal distribution in SAS. A friend wanted to simulate data
We’ve just published Decision Trees for Analytics Using SAS Enterprise Miner by Barry de Ville and Padraic Neville. Filled with many figures and examples, this comprehensive book has garnered strong early user reviews. We invited the authors to share a few words about their new book. Neville had this to
This article describes how to implement the truncated normal distribution in SAS. Although the implementation in this article uses the SAS/IML language, you can also implement the ideas and formulas by using the DATA step and PROC FCMP. For reference, I recommend the Wikipedia article on the truncated normal distribution.
There are many techniques for generating random variates from a specified probability distribution such as the normal, exponential, or gamma distribution. However, one technique stands out because of its generality and simplicity: the inverse CDF sampling technique. If you know the cumulative distribution function (CDF) of a probability distribution, then
ODS graph styles provide users with an easy way to control things such as the colors and fonts used in a graph, freeing the user from having to specify these properties in their code. A lot of thought was given to picking colors that work well together, and look good. The
In a previous article I discussed how to bin univariate observations by using the BIN function, which was added to the SAS/IML language in SAS/IML 9.3. You can generalize that example and bin bivariate or multivariate data. Over two years ago I wrote a blog post on 2D binning in
You’ve probably caught on by now that I live in the DC-metro area and suffer daily through the misery of congestion. Before I even reach for my keys, I check for the latest information from regional transportation agencies, especially Metro, to devise my plan of attack. Going way beyond the
Die politische Steuerung hat einen ernsthaften Verlust an Zustimmung in der Bevölkerung zu verzeichnen: Die fortschreitende Abnahme der Wahlbeteiligung ist nur eine, wenngleich wohl die präsenteste, Auswirkung dieser Entwicklung. Zuweilen wird das schwindende Vertrauen von Bürgerinnen und Bürgern in die Politik mit einer grundsätzlichen Abnahme des allgemeinen politischen Interesses in
It is often useful to partition observations for a continuous variable into a small number of intervals, called bins. This familiar process occurs every time that you create a histogram, such as the one on the left. In SAS you can create this histogram by calling the UNIVARIATE procedure. Optionally,
Did you know that more than 30,000 Americans die in traffic accidents every year? Interestingly, the U.S. import of mangoes from Brazil is found to be highly correlated with this fatality rate, as shown in the graph below. But are mango imports a good indicator of the future traffic fatality
This week's SAS tip is from Lauren Haworth, Cynthia L. Zender, and Michele Burlew's book Output Delivery System: The Basics and Beyond. This example-driven book includes broad coverage of some of the best features of ODS. To learn more about the book and the authors, visit our Web catalog to read
To say that I'm excited about the SAS 9.4 release is an understatement! For example, did you know that in SAS 9.4, you can write SAS/Graph output directly to a Powerpoint slide?!? This is definitely an item that was on my "wish list," and will no doubt make life a
SAS Forecast Server (release 12.3) is now shipping, and includes the new SAS Time Series Studio GUI. Time Series Studio (TSS), was released as "experimental" last August in 12.1, and is now in production. TSS provides an additional interface in Forecast Server, for time series data mining, exploration, and data preparation.
Are you still using the old RANUNI, RANNOR, RANBIN, and other "RANXXX" functions to generate random numbers in SAS? If so, here are six reasons why you should switch from these older (1970s) algorithms to the newer (late 1990s) Mersenne-Twister algorithm, which is implemented in the RAND function. The newer
SAS 9.3 already has smooth (anti-aliased) lines in SAS/GRAPH device=png output, and in SAS 9.4 you will also get smooth lines in your device=gif output (and gif animations)! Woo-hoo!!! Here are a couple of simple examples to demonstrate: The first example is device=gif Proc Gmap output. If you look very closely, you'll notice that
Mercifully, we have reached the final installment of Q&A from the June 20 Foresight-SAS webinar, "Forecast Value Added: A Reality Check on Forecasting Practices." As a reminder, a recording of the webinar is available for on-demand review, and the Foresight article (upon which the webinar was based) is available for free
