Wow, Jim- fun tid bit!  Unrelated to op, but I will say thank you- as I know it will be useful!

~Nicole Ford
Ph.D. Student
Graduate Assistant/ Instructor
Department of Government and International Affairs
University of South Florida
office: SOC 012M
e: nmhicks@mail.usf.edu
http://gia.usf.edu/student/nford/

Sent from my iPhone

On Feb 22, 2013, at 2:23 PM, jim holtman <jholtman@gmail.com> wrote:

> Run with:
> 
> options(error=utils::recover)
> 
> Then at the point of the error you will be able to examine sigma2$id
> which is probably not a numeric.  Any time you get an error like this,
> if you have been using the above statement in your script (which I
> always have turned on), you will be able to discover for yourself most
> of your bugs.  Debugging is an important talent to learn if you are
> going to be writing programs/scripts.
> 
> On Fri, Feb 22, 2013 at 2:02 PM, lara sowale <lara.dupe@gmail.com> wrote:
>> I am sorry to bug you, I am having this error whenever I want to run
>> random effects regression in software R: Error in if (sigma2$id < 0)
>> stop(paste("the estimated variance of the",  :
>>   missing value where TRUE/FALSE needed.
>> 
>> Please help me look into it.
>> 
>>        [[alternative HTML version deleted]]
>> 
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> 
> 
> -- 
> Jim Holtman
> Data Munger Guru
> 
> What is the problem that you are trying to solve?
> Tell me what you want to do, not how you want to do it.
> 
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

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