Apply format to a variable in sas

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How do I apply a YN. format to a variable in a sas dataset?

[zz]

I have a SAS dataset "AE".  There is a field "SERIOUS".  The format "YN." was missing.  If I need to apply the format "YN." to this "AE" dataset, what is the most straight forward and efficient way to apply "YN." format to the "SERIOUS" field in "AE" dataset.

Appreciate your help very much!

[ballardw · Accepted solution]

Most robust is usually when the data set is created if possible with a format statement.

If you aren't going to replace the version of the data set (are real sure you aren't) manually may work for you: open the dataset in table view click on the column heading and get the column properties, type the format name in the format box, apply and save.

Or from the Columns view of the data set from the explorer similar.

Or Proc Datasets will modify existing datasets

Proc datasets library=yourlib; /* put the name of the library where AE data set resides*/

   modify ae;

      format Serious YN.

   ;

   run;

quit;

Note that the procedure is one that supports multiple run statements so needs a quit; to actually end;

[zz]

Much appreciate it, ballardw!