search for: ztz

Hi, R users, I'm trying to transform a matrix A into B (see below). Anyone knows how to do it in R? Thanks. Matrix A (zone to zone travel time) zone z1 z2 z3 z1 0 2.9 4.3 z2 2.9 0 2.5 z3 4.3 2.5 0 B: from to time z1 z1 0 z1 z2 2.9 z1 z3 4.3 z2 z1 2.9 z2 z2 0 z2 z3 2.5 z3 z1 4.3 z3 z2 2.5 z3 z3 0 The real matrix I have is much larger, with more than 2000 zones. But I think it should

Using lmer in the lme4 package, you can compute the conditional variance-covariance matrix of the random effects using the bVar slot: bVar: A list of the diagonal inner blocks (upper triangles only) of the positive-definite matrices on the diagonal of the inverse of ZtZ+Omega. With the appropriate scale factor (and conversion to a symmetric matrix) these are the conditional variance-covariance matrices of the random effects. Is there anything similar in the nlme package using the lme function? Rick B.

I can't find a way to retrieve z values and p-values from the output from lmer in the lme4 package. How is this done? Rick B.

...: 469 Number of Groups: 21 ============================= Question 6: When I tried method="Laplace" an error occurred: > g1<-GLMM(count~thick+I(thick^2),random=~thick+I(thick^2) |plantid,poisson,data=Dataset,method="Laplace") Using optimizer nlm Error: rank deficiency of ZtZ+W detected at column 11 Is that indicating multicollinearity? Is there is a possibility to avoid this? I got also from time to time the message Omega[1] is not positive definite Can I fix this somehow? Question 7: Is there a possibility to calculate something like a pseudo-r- square (e.g. 1-(l...

Hi, I have been having a tedious issue with lmer models with lots of factors and lots of levels. In order to get the basic information at the beginning of the print out I also have to generate these enormous tables as well. Is there a method command to leave off all of the effects and correlations? Or, do I have to go to string commands?

Hello All, I would like to retrieve some of the results from the lmer(...) function in library lme4. If I run a model, say fm.1 <- lmer(y ~ 1 + (1 | x), data = dog) and try names(fm.1), I get NULL. Is there anyway to retrieve the information? Thanks

[Mod: This message is a reason *why* linux-security is moderated list. This is also a reason why Rogier, myself, Alan Cox and others really do not want to have completely open lists that deal with security related aspects of running a system as way too many people just jump to conclusions and give suggestions without doing any reasearch on a subject. -- alex (co-moderator of

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Hello list. I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without modifications. How did I try it? Created a (non-root) build environment (not a mock ) Installed the kernel.scr.rpm and did a rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee prep-out.log The build failed at the end: Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL Checking