[R-lang] Re: Fwd: [R] [R-pkgs] New package: ordinal

[jkingston@linguist.umass.edu]

This package is indeed useful, but be aware that you're limited in one  
random effect.
Best,
John

Quoting Roger Levy <rlevy@ling.ucsd.edu>:

> This package looks like it could be of interest to many R-lang members...
>
> Roger
>
> Begin forwarded message:
>
>> From: Rune Haubo <rhbc@imm.dtu.dk>
>> Date: March 16, 2010 3:45:14 AM PDT
>> To: r-packages@r-project.org
>> Subject: [R] [R-pkgs] New package: ordinal
>>
>> This is to announce the new R-package ‘ordinal’ that implements
>> cumulative link (mixed) models for ordinal (ordered categorical) data
>> (http://www.cran.r-project.org/package=ordinal/).
>>
>> The main features are:
>> -	scale (multiplicative) as well as location (additive) effects
>> -	nominal effects for a subset of the predictors (denoted partial
>> proportional odds when the link is the logistic)
>> -	structured thresholds, e.g. assuming symmetry or equidistant thresholds
>> -	random effects via the Laplace approximation and adaptive
>> Gauss-Hermite quadrature in the location-part of the model.
>> -	a range of standard link functions
>> -	flexible link functions where an extra link function-parameter
>> bridges the log-log, probit and c-loglog links (log-gamma), and
>> cloglog and logistic links (Aranda-Ordaz)
>> -	a suite of optimizers including an efficient Newton scheme.
>> -	works for binomial observations (a special case of ordinal data).
>> -	a suite of methods including anova, addterm, dropterm, profile,
>> confint, plot.profile, predict, in addition to the standard print and
>> summary methods.
>> -	an important special case is the proportional odds model (with
>> random effects).
>> -	a range of examples illustrates how to use the functions.
>>
>> Future additions will include:
>> -	more general random effect structures: multiple (crossed and nested)
>> and vector-valued random effects.
>> -	profile methods for variance parameters in mixed effect models.
>> -	helpful package vignettes.
>> -	implementation of core functions in C.
>>
>> Comments, critique, suggestions, wishes and contributions are always
>> highly appreciated.
>>
>> Kind regards
>> Rune
>>
>> -- 
>> Rune Haubo Bojesen Christensen
>>
>> PhD student, M.Sc. Eng.
>> Phone: (+45) 45 25 33 63
>> Mail: rhbc at imm.dtu.dk
>>
>> DTU Informatics, Section for Statistics
>> Technical University of Denmark, Build. 305, Room 122,
>> DK-2800 Kgs. Lyngby, Denmark
>>
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> --
>
> Roger Levy                      Email: rlevy@ling.ucsd.edu
> Assistant Professor             Phone: 858-534-7219
> Department of Linguistics       Fax:   858-534-4789
> UC San Diego                    Web:   http://ling.ucsd.edu/~rlevy
>
>
>
>
>
>
>
>
>



John Kingston
--------------------------------
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