Use the following code: DATA drug; INPUT ID : $2. Visit : MMDDYY8. rx_1-rx_4; DATALINES;
04 01/28/95 1 0 1 1 03 02/28/95 2 0 2 1 05 05/20/95 0 0 0 0 01 03/27/95 1 0 0 1 03 03/02/95 0 0 0 1 01 04/04/95 0 1 1 1 02 04/29/95 0 1 1 1 02 05/04/95 0 0 1 0 03 02/26/95 1 0 1 1 03 03/06/95 0 1 0 1 04 01/25/95 0 0 1 0 05 03/01/95 0 0 0 0 02 04/30/95 0 2 1 2 01 03/31/95 2 1 0 1 03 03/07/95 0 1 0 2 04 02/01/95 1 1 1 1 05 04/18/95 0 0 0 0 01 04/09/95 0 2 1 2;