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Is there an mixed effects R package that can be used to model ordinal data?

Does anyone know of a function or package that provides methods for variance components similar to S-Plus's "varcomp" and "is.random" functions? Thanks. Rick B.

Is there a way (simple or not) to get the marginal prediction from lme (in nlme) and/or lmer (in lme4)? Rick B.

Not sure if you are aware of the OpenMx SEM package (http://openmx.psyc.virginia.edu/). It's a very full-featured structural equation modeling package.

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.

Is there any way to subset a time series without converting the result to a matrix or vector? I would like to replace some values in the time series to see the effect on forecasts.

I need to generate autocorrelated binary data. I've found references to the IEKS package but none of the web pages currently exist. Does anyone know where I can find this package or suggest another package? Rick B.

Thompson's Manual to Accompany Agresti's book refers to a package named "repeated". It's not on CRAN from what I can see. I have seen rpm's for it. Where is the best place to download this package...

I cannot figure out how to use odfWeave to produce tables eith right-aligned columns. None of the examples show this and I'm completely confused on how to achieve this. Could someone share a simple example? Rick B.

I cannot figure out how to use odfWeave to produce tables with right-aligned columns. None of the examples show this and I'm completely confused on how to achieve this. Could someone share a simple example? Rick B.

Summarizing: I'm running R 2.4.1 on a current FC6 32-bit system. In order to have the rgl R package install, I needed to install both mesa-libGLU-devel (FC6 version is 6.5.1-9) and...

On Fri, 2010-10-22 at 12:31 -0200, Marcelo Lima wrote: > Hi, > > I generated a covariance matrix, since the diagonal of this matrix > represents the variance of my dataset I would like to extract it. Any > suggestions on how...

On 12/01/2011 07:18 AM, John Fox wrote: > > To:r-help at r-project.org > > Subject: [R] FIML with missing data in sem package > > You should check out the OpenMx R package. Just search for OpenMx and SEM...

Is there an R package available that would facilitate doing a power/sample size analysis for linear mixed effects models? I have seen the Java applets made available by Russell Length which would seem to be able to handle most...

I'm running simulation using lme and sometimes the estimated variance-covariance matrix is not positive definite so that the intervals function won't work for the random effect coefficients. I've tried varcomp from the ape package but this...

In S-Plus, there is a dates function, for example: dates("12/31/99") Is there a similar function in R? -- Rick Bilonick - mailto:rab at nauticom.net mailto:rabil at home.com -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www...

Francisco J Molina wrote: >Subject: Eliminate repeated components from a vector >X-Mailer: VM 7.00 under 21.4 (patch 6) "Common Lisp" XEmacs Lucid >Reply-To: fjmolina at lbl.gov >FCC: /home/f/.xemacs/mail/sent > > >Does anyone know...

On Mon, 2010-06-28 at 10:48 -0400, Robert Baer wrote: > y=rnorm(100) > x=abs(y) > plot(x, y, axes=FALSE) > axis(1, pos=0) > axis(2) > box() It's nice to know that R tends to make...

If you create plots and use odfWeave to create an odf text document, the default for figures is png bitmap graphics. The only way I've found to insert eps graphics is to first create the eps graphic using the...

I'm fitting a mixed effects model: fit.1 <- lme(y~x,random=~1|id,data=df) There are two different observations for each id for both x and y. When I use plot(fit.1), there is a strong...