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