MuMIn package news:
Version: 1.8.0 (2012-11-21)
This version introduces support for GEE models ('gee','geeglm' and 'yags')
ranked by QIC (note that 'yags' seems to be still quite buggy).
Also 'clmm' and 'clm' from package 'ordinal' are now handled properly.
QIC, quasiLik: new functions for use with GEE models
(p)dredge: argument 'subset' can be now a logical matrix representing allowed
parameter combinations. Some improvements for speed have been made.
(p)dredge, model.avg: new argument 'ct.args' for passing extra arguments
to 'coefTable'.
Version: 1.7.12 (2012-11-11)
tests/classes.R: fixed compatibility spdep-0.5.53. (spdep::spautolm now uses
method="eigen", was "full")
Version: 1.7.11 (2012-07-13)
coefTable.multinom: fixed an error when coefficients and standard errors were
matrices
get.models: now checks for the object class of the passed arguments
Version: 1.7.10 (2012-06-07)
(fixed) dredge: bug with an error message when number of predictor exceeded
maximum (thanks to Corina Logan for spotting this).
manual: added 'glmmADMB' to the list of supported classes (reported by Rocio
Jana)
'coxme' moved from 'Suggested' to 'Enhances' (to avoid build error when the
dependency is missing)
Version: 1.7.9 (2012-04-03)
Added 'predict' methods for 'lme' and 'lmer' (both can calculate 'se.fit').
'predict.lme' is a wrapper for its namesake from 'nlme' package (it is
not exported, so it's visibility depends on the order the packages were
loaded - but is always visible from MuMIn namespace).
Version: 1.7.8 (2012-04-01)
(fixed) 'coef.model.selection' returns now proper coefficients
Version: 1.7.7 (2012-04-01)
fixed dependencies in tests
Version: 1.7.6 (2012-04-01)
dredge: with nested formula designs, 'marg.ex' is now found automatically
predict.averaging: is now more flexible in how the predictions from generalized
models are calculated (new attribute "backtransform").
Version: 1.7.5 (2012-03-27)
Added methods for 'MCMCglmm' class, and function 'DIC': works with 'model.sel'
and 'dredge' (but not 'model.avg').
'unmarked' is removed from 'Suggested' packages (recently it is often
unavailable on CRAN and causes errors during R CHECK). Added workarounds to
pass (=cheat) the R CHECK.
Version: 1.7.3 (2012-02-01)
Added methods for 'glimML' class from package 'aod'
Version: 1.7.2 (2012-01-30)
(fixed) 'nobs.coxme' returned the number of events was returned rather than
the number of observations.
(fixed) 'coefTable' gave an error for 'coxph' null model.
(fixed) 'r.squaredLR' was evaluating the null model for 'lme' in a wrong
environment.
(fixed) 'getAllTerms' method for 'zeroinfl' was not registered.
dredge: checks each generated model for the correct number of observations.
Version: 1.7.1 (2012-01-26)
Added methods for 'hurdle' and 'zeroinfl' classes (package 'pscf').
coef, coefTable: new methods to extract coefficients from model selection
tables.
Documentation: list of supported models put into a separate page.
Version: 1.7.0 (2012-01-25)
This version adds possibility to model average and re-rank (with another IC) a
model selection table without recreating the fitted models. Models from
package 'coxme' are now supported. Model selection tables include now extra
columns showing differences in attributes of the modelling function call.
model.avg: use 'model.selection' without refitting the models. Fixed a problem
with averaging different types of models together (happened when 'df's were
available only for some of component models).
dredge: coefficient tables added to the result (attribute "coefTables"). The
code has been simplified.
print.model.selection: now reports random terms also for objects generated by
'model.sel'.
get.models: can handle 'model.selection' objects from 'model.sel'
model.sel: re-ranking 'model.selection' without recreating original models
(works only if the IC can be applied to logLik). Output has additional
columns showing differences between models (based on call's arguments)
Added generic methods for 'coxme' and 'lmekin' classes (package 'coxme').
Version: 1.6.6 (2012-01-07)
model.avg: fixed error occurring when non-estimable coefficients existed in the
component models (problem reported by Annabel Smith)
Version: 1.6.5 (2011-11-28)
pdredge example changed to use SOCK cluster type (portability issue).
Version: 1.6.4 (2011-11-26)
coefTable: replaces 'tTable' (which still exists, but is deprecated), it
accepts an argument 'dispersion'. The dispersion parameter can be also
passed from 'model.avg'.
pdredge: collects all the warnings and errors which occur during fitting, and
stores them. They are printed below the table.
The function does more thorough checking of the cluster nodes' environment,
for possible missing variables and functions.
get.models: "subset" argument can be now a character vector giving model names.
Added demos for model selection with models from 'unmarked' package using
'dredge' and 'pdredge'.
Version: 1.6.3 (2011-11-15)
pget.models: new function, parallel version of 'get.models'.
(p)get.models: important change of the default behaviour: without the 'subset'
argument, ALL models are returned. Also the '...' arguments were not used to
update the returned models - this is corrected now.
Version: 1.6.2 (2011-11-13)
pdredge: new function, a parallel version of dredge (experimental).
Version: 1.6.1 (2011-11-11)
dredge: added generic support for all 'unmarked' models, and fixed some bugs
with it.
model.names: new function (previously was internal only)
CAICF: adds to the collection of rarely used information criteria.
Version: 1.6.0 (2011-11-07)
dredge: most important change (although invisible to the user) is in the way the
model objects are updated. The new function 'makeArgs' is used to generate
the updated call. This results in a very flexible interface to the modelling
functions. The default method updates the 'formula' argument, other methods
can be used to deal with more problematic calls (the models from package
'unmarked' were a challenge). Apart from the model classes previously
supported by 'dredge', support for 'unmarkedFitOccu', 'unmarkedFitColExt'
and several other 'unmarkedFit' objects has been added.
dredge: has new argument 'extra' to add additional statistics into the model
selection table.
r.squared: new function to calculate likelihood-ratio based pseudo-R-squared
subset method for 'model.selection' accepts a shorthand notation "has(x)" to
select rows where a variable is present.
support for 'survreg' and 'rq' models (packages 'survival' and 'quantreg')
Version: 1.5.2 (2011-10-21)
dredge: fixed a bug with wrong ordering of column names in the returned
data.frame (thanks to Staffan Roos for reporting this).
Version: 1.5.1 (2011-10-20)
compatibility with R prior to 2.13.0: added workarounds for missing generic
function 'nobs'.
Version: 1.5.0 (2011-10-18)
model.avg: removed the argument "method", the standard errors and confidence
intervals are calculated only for coefficients averaged within a subset of
models where they are present (method = "NA"). The "full" coefficients are
also returned, but without std. errors.
plot.model.selection: new function to visualize the model selection table
manuals expanded, examples revised
getAllTerms: should work for most of the classes derived from 'unmarkedFit'
a load of small improvements, polishings and fixes, generally invisible to the
user.
Version: 1.4.4 (2011-10-16)
QAIC: no longer uses model deviance, as it gave biased values.
ICOMP, Cp: new information criteria
model.avg: now performs a smarter check for duplicate models, fixed calculation
of importance values
model.sel: new alias to 'mod.sel' (eventually will replace 'mod.sel').
Version: 1.4.3 (2011-10-13)
Beetle: new data - beetle mortality, with examples from B&A's book
dredge: new arguments 'varying', 'm.min' and 'evaluate'
manuals modified and corrected
tests/gamm.R: tests for 'gamm'/'gamm4' support.
Version: 1.4.2 (2011-10-11)
support for 'gamm' and 'gamm4'
gamm: added a wrapper for gamm, that allows for updating the object (hopefully
needed only temporarily)
Version: 1.4.1 (2011-10-10)
A few changes to vignette 'gamm'
Version: 1.4.0 (2011-10-05)
importance: new function
mod.sel: added method for a 'model.selection' object
Version: 1.3.10 (2011-09-23)
Reverted changes made in previous version (package dependencies) to succesfully
pass checks.
Version: 1.3.9 (2011-09-17)
removed *.lmer *.glmer methods, added dependency on lme4 >= 0.999375-16
tTable.mer: minor change
Version: 1.3.8 (2011-09-17)
Restored compatibility with R 2.12.2
getAllTerms: new attribute 'intercept'
Version: 1.3.7 (2011-09-16)
handling double intercept (phi(Int) and p(Int)) in 'unmarked'
Version: 1.3.6 (2011-09-12)
changes in the documentation and vignette
Version: 1.3.5 (2011-08-05)
mod.sel: new function
added methods for 'unmarkedFit' objects (package 'unmarked'), to provide
(limited) support in 'model.avg'
Version: 1.3.4 (2011-08-03)
Added vignette document on model selection with 'gamm' and 'gamm4'
(thanks to Graham MacDonald for an incentive)
Version: 1.3.3 (2011-08-01)
dredge: small improvements, no longer dependent on 'bitops'
Polished the documentation
Version: 1.3.2 (2011-08-01)
nobs: updated methods
Version: 1.3.1 (2011-07-31)
dredge: bugs fixed
Version: 1.3.0 (2011-07-29)
model.avg: now may be used directly with 'model.selection' object
summary.averaging: gives now more information
Version: 1.2.4 (2011-07-29)
fixed handling of spatial parameters (lambda, rho) in models from package 'spdep'
dredge: modified for better performance
dredge, get.models: can deal with glms with starting values provided ('start'
argument)
QAIC: added a note in documentation stating that is uses deviance rather than
logLik in the calculation
Version: 1.2.3 (2011-04-07)
fixed some REML/ML issues, AICc rewritten (based on the new AIC code in stats)
Version: 1.2.2 (2011-04-06)
nobs: corrected methods for mixed models, added documentation page
Version: 1.2.1 (2011-04-05)
.GetLogLik - hidden helper function (returns the proper logLik to use)
Version: 1.2.0 (2011-04-04)
AICc has new argument REML used with mixed models. Thanks to Benjamin Augustine
for suggestion.
Version: 1.1.2 (2011-03-19)
removed arguments 'alpha' and 'level' from model.avg. 'confint' is used instead
to obtain CI
Version: 1.1.1 (2011-03-18)
the printed output of 'averaging' has been made consistent with that of lm and
glm: 'print' gives concise information and 'summary' gives more details.
confint.averaging: new function.
print.summary.averaging: new function.
Version: 1.1.0 (2011-03-10)
added z-statistic, p-values (with significance stars) to model.avg output
Version: 1.0.0 (2011-02-10)
get.models: fixed - arguments in ... were not passed to updated models
predict.averaging: predictions on response scale can be calculated
(type=response)
new functions (not exported): nobs, coefDf
model.avg: now makes use of correct DF from component models in calculation of
adjusted SE
par.avg: calculates ASE if df are provided, example(QAIC) now demonstrates
predictions with confidence intervals
Version: 0.14.2 (2011-02-05)
dredge: small changes, slightly faster
manual corrected
Version: 0.14.1 (2011-02-04)
vcov.averaging, logLik.averaging: new methods,
revised formula for unconditional variance
manual reworked
Version: 0.14.0 (2011-01-19)
TODO: model.avg: added npar to the selection table
predict.averaging: now can return averaged SE
par.avg: may use revised formula for calculating averaged SE
Version: 0.13.21 (2011-01-16)
dredge: handling of update'd lmer models improved
QAICc: new function
Version: 0.13.20 (2011-01-16)
Namespace exports updated (coxph methods)
dredge: uses now QAIC for glms with 'quasi*' family, and if no rank is specified
Version: 0.13.19 (2011-01-15)
model.avg: fixed wrong ordering of model names (thanks to Dennis Jonason for
noticing this)
Version: 0.13.18 (2010-10-16)
Support for coxph (package survival)
Version: 0.13.17 (2010-09-13)
model.avg: fixed a bug with models with binary response;
dredge: added checking for na.omit'ting in the global model.
new tests: varia.R
Version: 0.13.16 (2010-09-07)
dredge, model.avg: broken support for several types of models was fixed
Version: 0.13.15 (2010-09-06)
support for MASS::multinom
Version: 0.13.14 (2010-09-03)
print.model.selection:empty columns are not printed now
Version: 0.13.13 (2010-09-02)
dredge: handling of models with no intercept, added "call" attribute
update.model.selection: new
Version: 0.13.12 (2010-08-29)
dredge, getAllTerms, dredge.Rd: small modifications
Version: 0.13.11 (2010-08-28)
getAllTerms: improved handling of interactions, random terms (lmer) and
"offset()"
formulaAllowed: now allows for exceptions in margins presence checking (new
argument: "except")
dredge: now tries to call fitting function directly rather than through update
(more effective in case when model not passed as a variable). New arguments:
"trace", and "marg.ex" - marginality checking exceptions.
Version: 0.13.10 (2010-08-26)
getAllTerms: fixed a bug with with wrong ordering of interaction terms (resulted
with a:b or b:a depending on the set of terms). Improved handling of random
terms in lme.
Version: 0.13.9 (2010-08-24)
dredge: fixed bugs introduced in the previous version
Version: 0.13.8 (2010-08-03)
QAIC: examples expanded
Version: 0.13.7 (2010-08-02)
dredge: prints errors generated by models as warnings (previously these were
skipped silently)
Version: 0.13.6 (2010-08-01)
print.model.selection: improved column abbreviation.
Version: 0.13.5 (2010-07-31)
dredge: fixed a bug causing interaction coefficients to be stripped from
model.selection table, new function 'fixCoefNames' (not exported) handles proper
ordering of interaction components in coefficient names.
Version: 0.13.4 (2010-07-21)
'beta.weights' now uses 'tTable' (support for more model types), 'dredge' with
beta=TRUE tries out if it can get beta.weights working.
Manual: added gls and rlm to the list of supported models
Version: 0.13.3 (2010-07-15)
Bug fixed in print.averaging
Version: 0.13.2 (2010-07-14)
Attributes for custom rank function in "dredge" and "model.avg" are now
evaluated model-wise, if provided as expressions.
Version: 0.13.0-1 (2010-07-12)
Fixed compatibility issues with models of class "lme" and "sarlm".
"model.avg" does now some checking whether all models were fitted to the same
data and have the same response.
Version: 0.12.13 (2010-07-09)
'recalc.weights' argument added to "subset.model.selection".
Small bug fixed in dredge.
Version: 0.12.12 (2010-07-08)
New in "dredge": Subsetting models a priori according to a formula
Version: 0.12.11 (2010-07-07)
Subset/extract methods for 'model.selection' object
Version: 0.12.10 (2010-07-05)
Fixed "predict.averaging" for missing 'newdata' handling; Table returned by
"dredge" now has factors for terms with more than one level (they were
previously shown as '1')
Version: 0.12.9 (2010-07-03)
Finally fixed problems with variable exporting and hidden methods
Version: 0.12.7-8 (2010-07-02)
Small changes in namespace and documentation
Version: 0.12.6 (2010-06-26)
Tidying up the code, small changes.
Version: 0.12.4 (2010-06-21)
added: "predict.averaging" and "coef.averaging", 'averaging' object contains
additional elements, so that several default methods work with it.
Version: 0.12.2 (2009-06-14)
fixed: 'alpha' in "model.avg" was not passed to "par.avg"
Version: 0.12.1 (2009-04-20)
fixed: method="NA" in model.avg, par.avg now accepts NA's in 'weight'
Version: 0.12.0 (2009-03-24)
Change in version number only. Had to make this jump in numbering, as there was
a typo in DESCRIPTION file of an early version, (0.11.2 instead of 0.1.0), and
since then R-forge mechanism seemed to ignore actual newer versions, as they had
lower number.
Version 0.1.1 (2009-03-22)
Modified: dredge: added "fixed" and "m.max" arguments.
Version 0.1.1 (2009-03-17)
Fixed: par.avg: Variance estimate corrected (previous estimate was square root
of variance). Thanks to Mick Wu.
Fixed: dredge: Apparently "expand.grid" cannot handle too many combinations, so
now dredge stops with a more explanatory message
Version 0.1.0
dRedging (0.11.2) moved to R-Forge.
Since model averaging is now the main focus of the package, its name changed
to MuMIn - MUltiModelINference.