A common question from statistical programmers is how to compute the rank of a matrix in SAS. Recall that the rank of a matrix is defined as the number of linearly independent columns in the matrix. (Equivalently, the number of linearly independent rows.) This article describes how to compute the
The date of Easter influences our leisure activities Different from many other public holidays, Easter is a so-called movable holiday. This means that the Easter bunny brings more than just eggs for the statistician - he brings special Easter forecasting challenges. In the year 325 CE the Council for Nicea
One of our customers asked if I could show him how to reproduce a stickman graph that David McCandless (ala, Information is Beautiful) had created - see screen capture below. I'm not sure that it's the best kind of graph for the occasion, but of course SAS can be used
“Begin with the end in mind” - Habit #2 from Stephen Covey’s ‘Highly Effective People’. The Edge Foundation is based on the premise of: “To arrive at the edge of the world's knowledge, seek out the most complex and sophisticated minds, put them in a room together, and have them
Well okay maybe you can't hear us, but at least you can read what we have to say. Although, I'm not ruling out an occasional video or podcast entry. One of the best kept secrets at SAS is the incredible domain expertise that comes to work here everyday, ready to
You may feel like the world is moving faster than ever. If so, then you can take solace in two facts: You're not alone in feeling this way. You're right. It is. Celebrating the 25-year anniversary of the Web, The Economist ran a piece examining the increasingly rapid adoption of new technologies.
As utilities expand analytic capabilities into more areas of the business, the reality of the data management challenge becomes very real. Most have accepted the era of "big data." But what about the quality of that big data? Is it reliable? What about the governance? Have the processes changed since
The 2015 SAS Global Forum is in Dallas, TX, and I'll be there. There are many talks to see and people to meet, so thank goodness for the agenda builder, which enables you to create a schedule in advance. I always enjoy talking with SAS customers about statistics, simulations, matrix
Copy/paste is my favorite method for creating new SAS programs. In my work projects, I maintain a sort of genealogy of SAS programs, because the DNA of one program can be used to spawn many other SAS programs as its progeny. When things (inevitably) aren't working as I intend in
JBF Special Issue on Predictive Business Analytics Dr. Chaman Jain, professor at St. Johns University, and editor-in-chief of the Journal of Business Forecasting, provides his preview of the Winter 2014-15 issue: Predictive Business Analytics, the practice of extracting information from existing data to determine patterns, relationships and future outcomes, is
It’s great to get in on something on the ground floor. That’s what happened at the inaugural Data4Decisions Conference and Exhibition held in Raleigh, NC, in March. It brought together business people, academics and students to explore how organizations use data management and analytics technology to enhance business processes and
Would you rather see a list of the world's 50 best roller coasters, or an interactive map? (... how about both!) Before we get started on this ride, here's a picture of my friend Jennifer's daughter, getting an early/young start on riding roller coasters (she's in the back, with her
Der Ostertermin beeinflusst unsere Freizeitaktivitäten Im Unterschied zu vielen anderen Feiertagen ist Ostern ein sogenannter „beweglicher“ Feiertag. Die Regelung besagt, dass Ostern auf jenen Sonntag fällt, der nach dem ersten Vollmond im Frühling liegt. Der früheste Termin für Ostern ist somit der 22. März, der späteste der 25. April. Bereits
In my last blog post, I introduced SAS Visual Analytics for UN Comtrade, which helps anyone glean answers from the most comprehensive collection of international trade data in the world. I’d like to share some of what we learned in the development process as it pertains to big data, high
In my last blog I detailed the four primary steps within the analytical lifecycle. The first and most time consuming step is data preparation. Many consider the term “Big Data” overhyped, and certainly overused. But there is no doubt that the explosion of new data is turning the insurance business
The topic of fracking has been in the news a lot lately - this blog post explores some of the finer points of plotting opinion data related to fracking ... I recently saw the following graph on dadaviz.com. It showed some interesting data, and presented the data in a way
As a data scientist, I have the rare privilege of possessing the job title that Tom Davenport and others have dubbed the sexiest job in the 21st Century. As this popular job title catches on, I’ve even noticed a trend where customers make direct requests for help specifically from “the data
A deep-rooted belly laugh can do so much for your body, mind and spirit. Just the other night, my 15 year old daughter was shredding some items for me so she could earn a little spending money. The shredder indicated six pages maximum, but it really should have said one
This SAS tip is from Robert Virgile and his book “SAS Macro Language Magic: Discovering Advanced Techniques”. We hope you find this tip useful. You can also read an excerpt from Virgile’s book. In macro language, as in life, timing is everything. Macro language students need to learn the timing
The Monty Hall Problem is one of the most famous problems in elementary probability. It is famous because the correct solution is counter-intuitive and because it caused an uproar when it appeared in the "Ask Marilyn" column in Parade magazine in 1990. Discussing the problem has been known to create
Just this morning, the course leader at our newly created SAS Space & Astronomy School told me that they picked up a broadcast signal from outer space. By analysing all the data they have been collecting, they were able to quickly spot a spike in the trend pattern, which helped
It's a common problem: Your organization collects vast amounts and types of data – but it's spread across different departments and locations in various formats and systems. It’s a massive challenge to make all that data available, connected and usable to everyone who needs it. That was the scene at
This SAS tip comes from Clement A. Stone and Xiaowen Zhu, authors of Bayesian Analysis of Item Response Theory Models using SAS. Item response theory (IRT) models are the models of choice for analyzing item responses from assessments in the educational, psychological, health, social, and behavioral sciences. SAS PROC MCMC
Simplify scheint eines der Modewörter in der IT zu sein. Alles, was bisher komplex war, um enterprise-ready zu werden, wird nun in einfache Komponenten aufgesplittet, um in appetitlichen Häppchen serviert zu werden. Ob ERP, CRM, IOT oder eben Big Data - die neue Welt der IT soll so simpel sein,
The other day, I was looking at an enterprise architecture diagram, and it actually showed a connection between the marketing database, the Hadoop server and the data warehouse. My response can be summed up in two ways. First, I was amazed! Second, I was very interested on how this customer uses
Bookies have long turned a trade in predicting the fate of our politicians in the general election. According to Ladbrokes, gamblers are set to spend a staggering £100m betting on this year’s result. The outcome of the May 7 vote is anticipated to be the hardest election to predict in
This blog post discusses the use of a black background in a graph. But before we get started, I invite you to have a listen to one of my favorite songs - "Paint it Black" by the Rolling Stones. Perhaps this song subliminally persuaded people to use black backgrounds in
There has been a spate of recent high-profile airline crashes (Malaysia Airlines, TransAsia Airways, Germanwings,...) so I was surprised when I saw a time series plot of the number of airline crashes by year, which indicates that the annual number of airline crashes has been decreasing since 1993. The data
In today’s era of digital marketing, advertisers have access to innovative tools and platforms, which enable them to provide Internet users with more personalized ads. Furthermore, in exchange for such helpful and free service, people do not mind sharing a little bit of personal information as it helps them find
In February of this year, the Washington Business Journal reported the US Government appointed its first Chief Data Scientist, DJ Patil. With this, I think it’s now safe to say that Data Science is officially sanctioned as new mode in organizations. Those that can apply the necessary finesse along with
