Filter to Include Observations

The Filter to Include Observations field is an optional parameter that enables you to subset an input data set. Only those observations that meet all of the conditions specified in the field are included in the analysis.

For example, to filter only diseased individuals from a data set containing a mixed population of diseased (sick) and healthy (healthy) individuals (as indicated in a column named DiseaseStatus), you could use the following simple WHERE expression:

WHERE DiseaseStatus = ‘sick’

Note: the word where has already been entered for you.

For more information about using filter fields, see The SAS WHERE Expression.