Last week I offered some techniques for management of technical debt. In this post I offer some more.Technical debt is a debt that you incur every time you avoid doing the right thing (like refactoring, removing duplication/redundancy), thereby letting…
Category: SAS
Kernel selection in PROC SVM
The support vector machine (SVM) is a flexible classification or regression method by using its many kernels. To apply a SVM, we possibly need to specify a kernel, a regularization parameter c and some kernel parameters like gamma. Besides the selectio…
Convert CHAR to NUM in PROC SQL
Use TO_NUMBER function in PROC SQL. proc sql; connect to oracle (user=xxx orapw=yyy path=”@zzz”); create table temp as select * from connection to oracle &nb…
SAS EG Add-Ins and WPF
Well, I finally made progress on getting my dynamic WPF add-in working. This was in large part to Chris Hemedinger helping out with some questions. What I have learned, I want to share so it is not lost.WPF works fine with EG except for some graphics i…
How to avoid data set merging problems when common BY variable has different lengths?
When merging 2 datasets with a common by-variable and when that common variable has different variable length, the merge process produce unexpected results. If you use SAS 9.2 version like me, then SAS Data step will inform you with the following…
When ROC fails logistic regression for rare-event data
ROC or AUC is widely used in logistic regression or other classification methods for model comparison and feature selection, which measures the trade-off between sensitivity and specificity. The paper by Gary King warns the dangers using…
Meet the SAS training instructor: Danny Modlin
Here at SAS Education, we know just how smart and personable our instructors are in and outside the classroom. But we realized, if you haven’t taken a SAS Training course, you may not know what kind of enthusiasm and dedication they put into their wo…
Analytics 2013 Orlando – that’s a wrap!
The Analytics Conference series wrapped its last event of the year in Orlando and, as promised, there was plenty to take in during the two-day event. Now what? You can watch all the highlights, including full keynotes, on demand! Among the keynote pres…