On Feb 8, 10:26 am, stringplaye...@YAHOO.COM (Dale McLerran) wrote: > --- On Sun, 2/7/10, Brian Sauer <brian.sa...@GMAIL.COM> wrote: > > > > > From: Brian Sauer <brian.sa...@GMAIL.COM> > > Subject: Re: proc logistic: 'out of memory' > > To: SA...@LISTSERV.UGA.EDU > > Date: Sunday, February 7, 2010, 4:47 PM > > I am in the process of testing the NLMIXED technique that Dale > > mentioned for my problem, but I wanted to share the answer I received > > from SAS support. > > Brian, > > > The problem is caused by the default check for dependencies between > > strata and the predictors in SAS 9.1. This can require a large amount > > of memory when there are many strata. You can turn off this check by > > specifying the NOLINDEP option in the STRATA statement. For example: > > > strata strata / nonlindep; > > > This check is off by default in all the current SAS 9.2 releases. > > > ---- > > NOTE: If you have any follow-up questions on this matter, please > > reply to this email by February 10, 2010. > > > - - - - - - - - - > > David Schlotzhauer > > Phone: (919) 677-8008 > > Senior Statistical Consultant Web: > > support.sas.com/ts > > SAS Institute Inc. > > OK, that is useful to know. However, the syntax specified above > does not match syntax in documentation of version 9.1.3 or 9.2. > The 9.2 documentation indicates the following syntax which I > would think would be the official syntax: > > strata ... / CHECKDEPENDENCY=NONE; > > Neither the CHECKDEPENDENCY option nor the NONLINEDEP option is > indicated in version 9.1.3 documentation. Have you tried the > syntax with NONLINDEP specified as an option in one (or both) > of these versions? > > Just as an aside, I am sure that it is reasonable to perform > this sort of linear dependency check when the number of strata > is small. However, it would seem that SI might have implemented > the linear dependency checking with an initial determination of > the number of strata in the data set. If the number of strata > is above a certain level (say, 1000), then the linear dependency > checking would not be enforced (under the assumption that given > a large number of strata, it is not likely that one would > encounter complete linear dependency between covariates and > strata. But from the standpoint of a computer programmer, I > can see where it is always good to evaluate whether the data > conform to the requirements of the estimation procedure. > > Dale > > --------------------------------------- > Dale McLerran > Fred Hutchinson Cancer Research Center > mailto: dmclerra@NO_SPAMfhcrc.org > Ph: (206) 667-2926 > Fax: (206) 667-5977 > ---------------------------------------

Dale, You are correct, the NONLINDEP causes an error. I am testing default and CHECKDEPENDENCY = NON now

Thanks guys, Brian