This post demonstrates how to select every nth observation from a SAS data set using the Point= Option, the Mod Function in the Data Step or PROC SQL.

This post demonstrates how to generate permutations in the SAS Data Step with the Call Randperm and Call Allperm Routines.

This post investigates the Memrc Argument to the Definedone Method in the SAS Hash Object. Not all the points are clear from the documentation.

Here, I demonstrate how to do random sampling with replacement in SAS with the Data Step and PROC SURVEYSELECT. Also, I discuss when to use which one.

Random sampling lets you select a random subset of observations from a data set. Statisticians use random sampling to draw inferences about populations based on subsets of that population. The subject of random sampling is massive. There are many different techniques...

I like to read SAS articles. In fact, articles inspire many of the posts on my blog. Today, I will show you the 10 articles that taught me the most. This was not an easy task. There are so many great articles. In so many fields within SAS. By so many great authors....

This post demonstrates how to use the SAS Hash Object to create dynamics lags. Also, we will see how this method handles By Groups swiftly.

The SAS Lag Function can produce undesirable results if not used with care. This post explains through example how the Lag Function works.

This post demonstrates the difference between a SAS function and a subroutine in PROC FCMP. Also, we will investigate when to use which.

This post demonstrates how to implement a hashing lookup scheme in SAS using temporary arrays and the MOD Function in the Data Step.