Subsetting Input Data Files
When only a subset of a data file is needed,
it is inefficient to extract all the data
and then subset it in a subsequent DATA step.
Instead, you can use the DATASOURCE procedure
options and statements to extract only needed information from the data file.
The DATASOURCE procedure offers the following subsetting capabilities:
- the INTERVAL= option controls the frequency of data output
- the KEEP or DROP statements selects a subset of time series variables
- the RANGE statement restricts the time range of data
- the WHERE statement selects a subset of cross sections
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
