Hi, I have a column that is partially populated in which the first row contains a non-zero value and the remaining rows contain zeros.  I would like to update the rows containing  zeros with the first value in the row.   I have tried using retain and FIRST.value functions to no avail.     In the example below first row contains 3.   I need SAS to read this first value, retain it and update the  remaining rows with 3.   Thanks!   3 0 0 0 0 0 ... View more