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Learn SAS
Rick Wicklin 0
Rotating matrices

This article is about rotating matrices. No, I don't mean "rotation matrices," I mean rotating matrices. As in turning a matrix 90 degrees in a clockwise or counterclockwise direction. I was reading a program written in MATLAB in which the programmer used a MATLAB function called ROT90, which rotates a

Rick Wicklin 0
Why it's okay to guess on the SAT test

Should you ever guess on the SAT® or PSAT standardized tests? My son is getting ready to take the preliminary SAT (PSAT), which is a practice test for the SAT. A teacher gave his class this advice regarding guessing: For a multiple-choice questions, if you can eliminate one or two

Rick Wicklin 0
Two applications of the "runs test"

In my last blog post I described how to implement a "runs test" in the SAS/IML language. The runs test determines whether a sequence of two values (for example, heads and tails) is likely to have been generated by random chance. This article describes two applications of the runs test.

SAS Events
Natalie Meyer 0
What's new with WUSS 2013

This year, SAS users are flocking to the Western Users of SAS Software’s (WUSS) annual conference. I had a chance to catch up with Operations Chair MaryAnne DePesquo, and she shared her excitement about this year’s conference. This is the first year that WUSS will be hosted in Las Vegas

Rick Wicklin 0
The first MOOC in statistics

Massive open online courses (MOOCs) are all the rage today. Some people see free online courses as a convenient way to introduce statistical concepts to tens of thousands of students who would not otherwise have an opportunity to learn about data analysis. Whereas 2013 is the International Year of Statistics,

Data Visualization
Sanjay Matange 0
Visual Index

Some of you may have already noticed the small graphical icon on the lower right side of the blog article labeled "Graphically Speaking Index".   Yes, it is a link to a visual index for all articles published in this blog.  Well, eventually it will have all the articles. So far, I

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