Filter to Include Observations

The Filter to Include Observations field is an optional parameter that enables you to subset an {link}{Emphasis}Input SAS 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.