The DO Loop
Statistical programming in SAS with an emphasis on SAS/IML programs
SAS formats are very useful and can be used in a myriad of creative ways. For example, you can use formats to display decimal values as a fraction. However, SAS supports so many formats that it is difficult to remember details about the format syntax, such as the default field
SAS programmers who have experience with other programming languages sometimes wonder whether the SAS language supports statements that are equivalent to the "break" and "continue" statements in other languages. The answer is yes. The LEAVE statement in the SAS DATA step is equivalent to the "break" statement. It provides a
It is time for Pi Day, 2017! Every year on March 14th (written 3/14 in the US), geeky mathematicians and their friends celebrate "all things pi-related" because 3.14 is the three-decimal approximation to pi. This year I use SAS software to show an amazing fact: you can find your birthday
I recently needed to solve a fun programming problem. I challenge other SAS programmers to solve it, too! The problem is easy to state: Given a long sequence of digits, can you write a program to count how many times a particular subsequence occurs? For example, if I give you
Suppose you have several discrete variables. You want to conduct a frequency analysis of these variables and print the results, but ONLY for variables that have three or more levels. In other words, you want to conditionally display some results, but you don't know which variables satisfy the condition until
After reading my article about how to use BY-group processing to run 1000 regression models, a SAS programmer asked whether it is possible to reorder the output of a BY-group analysis. The answer is yes: you can use the DOCUMENT procedure to replay a portion of your output in any