A follow-up "birdie-gram" informs me that the new behavior also applies to REPORT, TABULATE, and SURVEYMEANS.

On Mon, 11 Jun 2001 17:19:18 -0400, Howard Schreier <Howard_Schreier@ITA.DOC.GOV> wrote:

>Apparently this change in behavior is intentional but undocumented. It also >gets more interesting when there is printed (that is ODS) output. > >According to a little birdie: In v8, PROC MEANS/SUMMARY was changed so that >numeric CLASS variables lacking an explicit format are grouped according to >their internal (unformatted) values, unless an option requiring formatted >values (such as ORDER=FORMATTED) is specified. But if two class levels have >the same formatted value, an ODS bug/feature (take your choice) causes all >but the first such level to be blanked out in ODS output. This change was >made to improve performance, since the BEST12. format is rather slow. As far >as I know (which may not be very far), most other procedures having CLASS >statements still use the default of BEST12. for numeric variables lacking an >explicit format. > >Here's an illustration. Start with the same test data I used earlier: > > data newloans; > input acctkey advtp; > cards; > 123456789012 3 > 123456789010 4 > 1234567890123 5 > 1234567890120 6 > ; > >Note that there are two 12-digit integers and two 13-digit integers. The >latter would have the same formatted (BEST12.) value. > >But no format has been associated with ACCTKEY. So the following PROC step >preserves all four levels under V.8 (whereas under earlier versions, BEST12. >would apply by default and the two 13-digit ACCTKEY levels would get rolled >together). > > proc means data=newloans nway sum; > class acctkey ; > var advtp ; > output out=advtp00 sum= ; > run; > > >Here is the V.8 output: > > The MEANS Procedure > > Analysis Variable : advtp > > N > acctkey Obs Sum > > 123456789010 1 4.0000000 > > 123456789012 1 3.0000000 > > 1.2345679E12 1 6.0000000 > > 1 5.0000000 > >So PROC MEANS/SUMMARY has used internal values in its processing but >formatted values for presentation. > >The SAS data set, however, records the original values. When printed with an >adequately wide format: > > proc print data=advtp00; > format acctkey 13.; > run; > >One gets: > > Obs acctkey _TYPE_ _FREQ_ advtp > > 1 123456789010 1 1 4 > 2 123456789012 1 1 3 > 3 1234567890120 1 1 6 > 4 1234567890123 1 1 5 [snip]