Problem Note 53123: PROC NLMIXED might produce incorrect predicted values when the data is not sorted by the SUBJECT= variable
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Beginning in SAS 9.4 TS1M1 (SAS/STAT 13.1), PROC NLMIXED no longer requires the input data set to be sorted by the SUBJECT= variable (specified in the RANDOM statement). The results should be the same whether the data set is sorted by subject or not. However, if the data set is not sorted by the SUBJECT= variable, certain results might be incorrect. In particular, predicted values produced by the PREDICT statement and random effect predictions produced by the OUT= option in the RANDOM statement might be incorrect.
To circumvent this problem, sort the input data set by the SUBJECT= variable before running PROC NLMIXED.
A hotfix is planned for this issue.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | SAS/STAT | z/OS | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 |
| Microsoft® Windows® for x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Enterprise 32-bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Enterprise x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Pro 32-bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Pro x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Enterprise 32-bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Enterprise x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Pro | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Pro 32-bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2008 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2008 R2 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2008 for x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 Datacenter | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 R2 Datacenter | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 R2 Std | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 Std | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Enterprise 32 bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Enterprise x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Home Premium 32 bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Home Premium x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Professional 32 bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Professional x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Ultimate 32 bit | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Windows 7 Ultimate x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| 64-bit Enabled AIX | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| 64-bit Enabled Solaris | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| HP-UX IPF | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Linux for x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
| Solaris for x64 | 13.1 | 13.2 | 9.4 TS1M1 | 9.4 TS1M2 | ||
A fix for this issue for SAS/STAT 13.1_M1 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/M72.html#53123
PROC NLMIXED no longer requires the input data set to be sorted by the SUBJECT= variable in the RANDOM statement. If the data set is not sorted, some of the predicted values might be incorrect.
| Type: | Problem Note |
| Priority: | alert |
| Topic: | SAS Reference ==> Procedures ==> NLMIXED Analytics ==> Mixed Models |
| Date Modified: | 2014-06-17 14:12:43 |
| Date Created: | 2014-06-03 16:06:17 |