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get_df

Extract degrees of freedom

Description

Estimate or extract residual or model-based degrees of freedom from regression models.

Usage

get_df(x, ...)

## Default S3 method:
get_df(x, type = "residual", verbose = TRUE, ...)

Arguments

x

A statistical model.
...

Currently not used.
type

Can be "residual" or "model". "residual" tries to extract residual degrees of freedoms. If residual degrees of freedom could not be extracted, returns n-k (number of observations minus number of parameters). "model" returns model-based degrees of freedom, i.e. the number of (estimated) parameters.
verbose

Toggle warnings.

Examples

model <- lm(Sepal.Length ~ Petal.Length * Species, data = iris)
get_df(model) # same as df.residual(model)
get_df(model, type = "model") # same as attr(logLik(model), "df")
insight

Easy Access to Model Information for Various Model Objects

v0.14.0
GPL-3
Authors
Daniel Lüdecke [aut, cre] (<https://orcid.org/0000-0002-8895-3206>, @strengejacke), Dominique Makowski [aut, ctb] (<https://orcid.org/0000-0001-5375-9967>, @Dom_Makowski), Indrajeet Patil [aut, ctb] (<https://orcid.org/0000-0003-1995-6531>, @patilindrajeets), Philip Waggoner [aut, ctb] (<https://orcid.org/0000-0002-7825-7573>), Mattan S. Ben-Shachar [aut, ctb] (<https://orcid.org/0000-0002-4287-4801>), Brenton M. Wiernik [aut] (<https://orcid.org/0000-0001-9560-6336>, @bmwiernik)
Initial release

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