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 probe set IDs less than or equal to “ 1709_g_at ”, you could use the following simple WHERE expression:

WHERE probe_set_id <= “1709_g_at”

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

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