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The R GAMLSS packages

The GAMLSS software is implemented in a series of packages in the R language ((R Development Core Team, 2007), and it is available from CRAN the R library at www.r-project.org . Note that dependencies of the packages have changed radically in version 3.0-0.

The GAMLSS software currently comprises of the following different packages:

• the original gamlss package for fitting GAMLSS (now depends on gamlss.dist and gamlss.data
• the gamlss.add experimental package for new additive terms (not in CRAN).
• the gamlss.boot experimental package for bootstrapping centile curves (not in CRAN).
• the gamlss.cens package for fitting censored (interval) response variables.
• the gamlss.data package for all example data used in GAMLSS
• the gamlss.demo package for demos using rpanel.
• the gamlss.dist package for all gamlss.family distributions
• the gamlss.mx package for fitting finite mixture distributions.
• the gamlss.nl package for fitting nonlinear models
• the gamlss.rsm experimental package for fitting randomly stopped models (not in CRAN).
• the gamlss.sparse experimental package using sparse matrices (not general yet therefore not in CRAN).
• the gamlss.tr package for fitting truncated distributions.
• the gamlss.util package having functions not necessarily related to GAMLSS (not in CRAN).

All the gamlss.family distributions are now implemented in the package gamlss.dist .

Downloading the R GAMLSS packages

The following table shows all the latest version:

The current gamlss packages

the packages	zip for windows	the tar zip files
gamlss 4.0.0 (the original)	zip	tar
gamlss.add 4.0.0 additional additive terms (test version)	zip	tar
gamlss.boot 1.6.5 (test version)	zip	tar
gamlss.cens 4.0.0 (interval response)	zip	tar
gamlss.data 4.0.0 (all data files)	zip	tar
gamlss.demo 4.0.0 (demos)	zip	tar
gamlss.dist 4.0.0 (all distributions)	zip	tar
gamlss.mx 4.0.0 (for finite mixtures)	zip	tar
gamlss.nl 4.0.0 (for non linear terms)	zip	tar
gamlss.rms 1.0.0 (test version of randomly stopped models)	zip	tar
gamlss.sparse 0.0.1 (using sparse matrices)	zip	tar
gamlss.tr 4.0.0 (for truncated distributions)	zip	tar
gamlss.util 4.0.0 (functions for extra utilities )	zip	tar

The manuals for the packages

The gamlss packages reference card .

Each packages has its individual help files. Here is a list of whet user may find useful.

• The second edition of the manual of the gamlss package in pdf form. This is a good starting point covering most of the topics of the original gamlss package.

• The Journal of Statistical software paper which has a brief introduction to GAMLSS and shows how the models can be used in practice.

• Course note from the Utrecht 2008 short course on GAMLSS.

Extra data

Data used in the RSS paper

• Dutch Girls .
• AEP data .
• Hodges data .
• River flow data .

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