Parameters | Copy Number | Filter to Include Observations

Filter to Include Observations
The Filter to Include Observations field is an optional parameter that enables you to subset an 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 .