Hi all, Sorry for the sloppy description of problem.
I have a dataset called dense. I want to decompose the variability/variation into different components such as wafer, axis, orientation and data. These variables are all categorical data. I converted axis, orientation and location into factors before I ran the analysis: lme(Data~1,random=~1|Wafer/axi/ori/loc,data=Dense) The algorithm returns the standard deviation of each random effect, but also gives the warning message: Warning message: - not meaningful for factors in: Ops.factor(y[revOrder], Fitted) I wonder what does this warning message mean? If the factors are not meaningful, how can I find out which factors the warning message is referring to? Thanks. Yen Lin -----Original Message----- From: Berton Gunter [mailto:[EMAIL PROTECTED] Sent: Monday, January 09, 2006 9:34 AM To: Chia, Yen Lin Subject: RE: [R] warning message from nlme > > Can someone point out what is the meaning of this warning message? I > tried to look at Ops.factor, but I don't understand it since I'm > relatively new to R. Thanks. > No. **Read the posting guide** and provide sufficient details in your post so that an answer can be given. -- Bert ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html