Robert Allison's SAS/GRAPH: Beyond the Basics collects examples that demonstrate a variety of techniques you can use to create custom graphs using SAS/GRAPH software. To celebrate the book’s publication, we asked Robert to tell us more about why he loves SAS/GRAPH. Here’s what he had to say: A graph is
Last week I introduced this series. Today I begin to dive deeper into each of the four E's. First up? Enforcement. In 2009, there were 5.5 million police-reported traffic crashes. Law enforcement officers work diligently to prevent crashes by enforcing traffic safety laws pertaining to, among other things, seat belt
To a statistician, the LAG function (which was introduced in SAS/IML 9.22) is useful for time series analysis. To a numerical analyst and a statistical programmer, the function provides a convenient way to compute quantitites that involve adjacent values in any vector. The LAG function is essentially a "shift operator."
