Problem Note 19727: Incorrect results when AGGREGATE= variables are formatted
If the SCALE= and AGGREGATE= options are specified in the MODEL
statement, and if a variable specified in AGGREGATE= option is formatted
in such a way as to combine categories of the original variable, then
the calculation of degrees of freedom for the Pearson and deviance
statistics is incorrect, leading to an incorrect estimate of the scale
parameter, incorrect standard errors of the parameters, and incorrect
p-values for tests of the parameters.
For any formatted variable specified in AGGREGATE=, you can avoid the
problem by creating an unformatted variable with the desired values.
The PUT function in the DATA step can be used to create a new variable
from an old one, applying a format to the values.
Operating System and Release Information
| SAS System | SAS/STAT | Microsoft Windows Server 2003 Datacenter Edition | 9 TS M0 | 9.2 TS1M0 |
| Microsoft Windows NT Workstation | 8 TS M0 | |
| Microsoft Windows XP 64-bit Edition | 9.1 TS1M3 | 9.2 TS1M0 |
| Microsoft Windows 95/98 | 8 TS M0 | |
| Microsoft® Windows® for 64-Bit Itanium-based Systems | 9 TS M0 | 9.2 TS1M0 |
| Microsoft Windows Server 2003 Standard Edition | 9 TS M0 | 9.2 TS1M0 |
| Microsoft Windows Server 2003 Enterprise Edition | 9 TS M0 | 9.2 TS1M0 |
| Microsoft Windows XP Professional | 9 TS M0 | 9.2 TS1M0 |
| Microsoft Windows 2000 Server | 8 TS M0 | 9.2 TS1M0 |
| Microsoft Windows 2000 Datacenter Server | 8 TS M0 | 9.2 TS1M0 |
| Microsoft Windows 2000 Professional | 8 TS M0 | 9.2 TS1M0 |
| OpenVMS VAX | 8 TS M0 | |
| Microsoft Windows 2000 Advanced Server | 8 TS M0 | 9.2 TS1M0 |
| 64-bit Enabled Solaris | 8 TS M0 | 9.2 TS1M0 |
| Solaris | 8 TS M0 | 9.2 TS1M0 |
| OS/2 | 8 TS M0 | |
| IRIX | 8 TS M0 | |
| z/OS | 8 TS M0 | 9.2 TS1M0 |
| Linux on Itanium | 9.1 TS1M3 | |
| Linux | 9 TS M0 | 9.2 TS1M0 |
| ABI+ for Intel Architecture | 8 TS M0 | |
| HP-UX IPF | 9 TS M0 | 9.2 TS1M0 |
| HP-UX | 8 TS M0 | 9.2 TS1M0 |
| 64-bit Enabled HP-UX | 8 TS M0 | 9.2 TS1M0 |
| 64-bit Enabled AIX | 8 TS M0 | 9.2 TS1M0 |
| CMS | 8 TS M0 | |
| OpenVMS Alpha | 8 TS M0 | 9.2 TS1M0 |
| Tru64 UNIX | 8 TS M0 | 9.2 TS1M0 |
| AIX | 8 TS M0 | 9.2 TS1M0 |
*
For software releases that are not yet generally available, the Fixed
Release is the software release in which the problem is planned to be
fixed.
| Type: | Problem Note |
| Priority: | alert |
| Topic: | Analytics ==> Regression
Analytics ==> Analysis of Variance
SAS Reference ==> Procedures ==> GENMOD
Analytics ==> Bayesian Analysis
Analytics ==> Categorical Data Analysis
Analytics ==> Longitudinal Analysis
|
| Date Modified: | 2007-04-04 11:43:08 |
| Date Created: | 2007-03-12 16:08:15 |
