What This Document Is
This study guide focuses on advanced SAS programming techniques, specifically exploring macro language features within the SAS environment. It’s designed for students in a statistical computing course (STAT 6800 at Western Michigan University) and delves into the intricacies of macro programming – a powerful tool for automating tasks and creating reusable code. The material centers around controlling the flow of execution *within* SAS macros, going beyond basic macro variable assignments.
Why This Document Matters
This resource is invaluable for students aiming to master SAS and improve their data analysis workflow. If you're struggling with repetitive coding tasks, or need to build complex SAS programs with dynamic elements, understanding macro language control structures is essential. It’s particularly helpful when you need to create flexible and adaptable SAS solutions for various statistical analyses. This guide will support your learning as you tackle more sophisticated programming challenges and prepare for advanced coursework or professional applications of SAS.
Common Limitations or Challenges
This guide concentrates *solely* on macro language features. It does not cover fundamental SAS programming concepts (like DATA steps or PROC steps) or statistical methods. It assumes a foundational understanding of SAS syntax and macro variables. Furthermore, while it explains the *mechanics* of different control structures, it doesn’t provide complete, ready-to-use macro programs – it focuses on building blocks and conceptual understanding. It won’t walk you through specific data analysis scenarios.
What This Document Provides
* An overview of various macro loop types and their applications.
* Detailed explanations of iterative `%DO` statements, including syntax and parameters.
* Discussions on `%DO %UNTIL` and `%DO %WHILE` statements for conditional looping.
* Guidance on using `%GOTO` or `%GO TO` statements for controlling macro execution flow.
* An exploration of `%label` statements for defining labels within macros.
* An introduction to conditional execution using `%IF - %THEN / %ELSE` statements.
* Clarification on the differences between macro loops and DATA step loops.
