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 chromosome 3 observations from a data set containing observations on multiple chromosomes (as indicated in a column named seqname), you could use the following simple WHERE expression:

WHERE seqname = ‘chr3’

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

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