Equations that involve trigonometric functions can have infinitely many solutions. For example, the solution to the equation tan(θ)=1 is θ = π/4 + kπ, where k is any integer. In order to obtain a unique solution to the equation, we define the "arc" functions: inverse trigonometric functions that return a
Have you ever been bitten by a mosquito? What are the odds it carried the West Nile virus? ... Perhaps a lot higher than you thought! Here's a picture of a mosquito that kept 'bugging' me around my computer desk at home - good riddance, I say!
Bill Benjamin’s bestseller, Exchanging Data between SAS and Microsoft Excel: Tips and Techniques to Transfer and Manage Data More Efficiently, was pipped at the post as he narrowly missed the top spot to Implementing CDISC Using SAS: An End-to-End Guide, at last month’s PharmaSUG 2015 meeting in Orlando -- by one
Operations technology (OT), such as control systems, are crucial elements in our daily lives. They make the stoplights function at intersections. They guide robots with precise movements on the shop floor. Their switches and routers are the backbone of our internet. But what if they were even more intelligent? What
I believe most people become overwhelmed when considering the data that can be created during event processing. Number one, it is A LOT of data – and number two, the data needs real-time analysis. For the past few years, most of us have been analyzing data after we collected it,
The SGPLOT procedures includes features to add annotations to your graph in many different ways. Annotations provide you a flexible way to add features to your graph that are not available through the standard plot statements. Recently, I saw this graph on the web that caught my attention. Clearly, this looks like
When reading a text file (common extensions: TXT, DAT; or, for the adventurous: HTML) with the DATA STEP, you should always view several lines from the text file, and compare to the record layout, before completing the INPUT statement. There are many ways to view a text file. I use
I still remember the first time I was asked to "consult" on a statistical problem. A former physics professor had some students who had gathered data that should lie along an arc of a theoretical circle. The professor asked if there was a regression technique that could find the center
I am noticing a trend. At the ASSA meetings in January (where economics, sociology and finance academics and practitioners gather to discuss their research) I was surprised to see how much “machine learning” was trending with economists. The session “Machine Learning Methods in Economics and Econometrics,” with papers by Susan
➤ 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
My previous blog was about popular first names ... now for a blog about popular surnames (ie, last/family names)! But before we get started, here's a little pop-quiz - what country is my friend Mr. Foley's surname from?
In my last two posts, I introduced some opportunities that arise from integrating event stream processing (ESP) within the nodes of a distributed network. We considered one type of deployment that includes the emergent Internet of Things (IoT) model in which there are numerous end nodes that monitor a set of sensors,
Default PROC FREQ output looks like this: Suppose you don't want the two cumulative statistic columns above. No problem. Those can be suppressed with the NOCUM option on the TABLE statement, like this: proc freq data=sashelp.shoes; table product / nocum; run;
The Internet has been around a long time. "Things" have been around even longer. Put the things on the Internet, aka the Internet of Things (IoT), and you get so much hype that IoT is at the top of Gartner's "Peak of Inflated Expectations" – and poised for a fall into the "Trough of
If you have your SAS Certified Platform Administrator Credential, then it’s clear that you’ve studied a lot to achieve it. But suddenly the Hadoop era shows up and what you find are big gaps in your skills inventory. SAS administrators must be familiar with all the data SAS platform can
USA Today recently published an article titled 10 retailers take two-thirds of your money. The story highlights the revenue distribution among the Top 100 retailers in the S&P 1500. It was startling to see that such a small number of retail powerhouses take in such a large percentage of consumers’ income.
An important goal of SAS Environment Manager is to communicate with existing software systems. This capability includes not only monitoring other non-SAS platform resources, but also means having the ability to respond to events from outside the SAS platform. We’ve seen how SAS Environment Manager can generate an event for external consumption (see Scott McCauley’s
A couple of years ago, I blogged about the most popular baby names in the US over the past 100 years. This time, I focus on the most recent year, and take it to the state level! But before we get started, here's a picture of my friend Jennifer's daughter,
A couple weeks ago, I completed my third half ironman (a triathlon consisting of a 1.2 mile swim, 56 mile bike ride, and 13.1 mile run), and WOW; it was a hard event! I had an awesome race back in October and had high expectations for this race – even
I was reading a statistics book when I encountered a histogram that caught my eye. The histogram looked similar to the one at the left. It contained a normal density estimate overlaid on a histogram, but the height of the density curve seemed too short when compared to the heights
There is a job category unfamiliar to most people that plays a crucial role in the creation of analytics software. Most can surmise that SAS hires software developers with backgrounds in statistics, econometrics, forecasting or operations research to create our analytical software; however, most do not realize there is another
SAS Cares. That’s how we want you to feel once you become a SAS customer. How do we do that? By bringing all of the support resources together with one goal in mind – helping you become a better SAS user. The SAS Cares experience involves everything from searching on
In my previous post, I discussed the similarities, differences and overlap between event stream processing (ESP) and real-time processing (RTP). In this post, I want to highlight three things that need to get real. In other words, three things that should be enhanced with real-time capabilities, whether it’s ESP, RTP or
Have you ever heard the expression, “Guess I gotta pay the piper.”? It is often used about a situation where a price is paid that is considered too high or unfair, but failing to pay the price often results in dire consequences. This expression is based on the story of
I guess most of us have a morbid curiosity about how we're going to die ... which is probably why Francis Boscoe's Causes of Death map went viral (no pun intended, of course!). This blog post shows how to create such a map... But first, to lighten up the mood a bit
I’ve had the good fortune to support the Pharmaceutical Industry SAS Users Group as their SAS liaison for the majority of their conferences since 1996. That’s meant a lot to me personally and professionally over the years. I’ve developed some genuine friendships with the dedicated volunteer leaders who organize the
I recently taught a SAS training course where the students were very engaged. They had so many questions, I could have spent the next month writing helpful blog posts that came from that one class. However, I picked this one question that the class begged for me to share. The
A SAS programmer asked for a list of SAS/IML functions that operate on the columns of an n x p matrix and return a 1 x p row vector of results. The functions that behave this way tend to compute univariate descriptive statistics such as the mean, median, standard deviation, and quantiles. The following
This month we take a fresh analytical view of our hypothetical VirtualOil portfolio by comparing the forward price of WTI (the green line) to the prompt month price (red line). The resulting graphic (chart 1) demonstrates the relative stability of the 48-month forward price in contrast to a very active spot
SAS offers a rich collection of features for working with Hadoop quickly and efficiently. This post will provide a brief run-through of the various technologies used by SAS to get to data in Hadoop and what’s needed to get the job done. Working with text files Base SAS software has the
