How to Modify Your SAS Macro to Loop Through and Process Each Secid in Your List

Learn how to modify your SAS macro to effectively loop through and process each secid in your list. Enhance your SAS programming skills by mastering macro loops.
---
How to Modify Your SAS Macro to Loop Through and Process Each Secid in Your List

When working with SAS, there are times when you'll need to loop through a list of values and process each value with the help of a macro. One common application of this technique is processing multiple secids (security identifiers) within a dataset. In this post, we'll cover how to effectively modify your macro to loop through and process each secid in your list.

The Initial Setup

Firstly, you need to define the list of secids you want to loop through. This can be done using a comma-separated list or a data step to build your list. Here’s an example of a list stored in a macro variable:

[[See Video to Reveal this Text or Code Snippet]]

Each secid in this list will be processed individually by the macro.

Defining the Macro

Next, you'll define the macro that processes each secid. For demonstration, here’s a simple macro that prints the value of each secid:

[[See Video to Reveal this Text or Code Snippet]]

%local i secid; declares local macro variables i and secid.

%do i = 1 %to %sysfunc(countw(&secids, %str(,))); initializes a loop from 1 to the number of secids in the list.

%let secid = %scan(&secids, &i, %str(,)); extracts each secid value from the list based on the current loop index.

%put The current secid is: &secid; prints the current secid to the SAS log.

Running the Macro

To run the macro, simply call it with your list of secids:

[[See Video to Reveal this Text or Code Snippet]]

This call will loop through each secid in the list and print it to the SAS log.

Enhancing the Macro

You can enhance your macro to perform more complex operations. For example, you can use the secid to filter data or execute other procedures within the loop:

[[See Video to Reveal this Text or Code Snippet]]

In this enhanced version:

The data step creates new datasets filtered by each secid.

The proc print step prints these datasets.

By modifying the content within the loop, you can tailor the macro to fit specific needs and processing requirements.

Conclusion

Mastering loops within macros can significantly streamline your data processing tasks in SAS, especially when managing batches of identifiers like secids. Understanding and implementing these methods will enhance your efficiency and coding capabilities in SAS programming.

Видео How to Modify Your SAS Macro to Loop Through and Process Each Secid in Your List канала blogize