[R] Latent models

[Prof Brian Ripley]

Those are only a few of the possible latent models.  Factor analysis and 
SEM are also latent variable models, as indeed are the mixed models of 
nlme, lme4, mmlcr, polr models ....  Then there are the graphical models 
of (at least) packages ggm and latentnet, polytomous LDA in package 
polLCA ....

help.search("latent", agrep=FALSE) on a comprehensive installation helped 
me find some of these.

On Wed, 22 Nov 2006, ronggui wrote:

> Is "ltm" what you want?
>> packageDescription("ltm")
> Package: ltm
> Title: Latent Trait Models under IRT
> Version: 0.6-1
> Date: 2006-10-02
> Author: Dimitris Rizopoulos <dimitris.rizopoulos at med.kuleuven.be>
> Maintainer: Dimitris Rizopoulos <dimitris.rizopoulos at med.kuleuven.be>
> Description: Analysis of multivariate dichotomous and polytomous data
>       using latent trait models under the Item Response Theory
>       approach. It includes the Rasch, the Two-Parameter Logistic,
>       the Birnbaum's Three-Parameter, and the Graded Response Models.
> Depends: R(>= 2.3.0), MASS, gtools, msm
> LazyLoad: yes
> LazyData: yes
> License: GPL version 2 or later
> URL: http://wiki.r-project.org/rwiki/doku.php?id=packages:cran:ltm
> Packaged: Tue Oct 3 09:07:38 2006; dimitris
> Built: R 2.4.0; ; 2006-10-03 17:16:04; windows
>
>
> If you are looking function for "Latent Class Analysis (LCA)", then
> "lca" in package e1071 is what you want.
>
>
> On 11/22/06, Bi-Info (http://members.home.nl/bi-info) <bi-info at home.nl> 
> wrote:
>> Hai,
>> 
>> Can anyone help me with some literature (R related) about latent models?
>> 
>> Thanx,
>> 
>> Wilfred
>> 
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>> 
>
>
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595