lme4: sigma – R documentation

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sigma

Extract Residual Standard Deviation 'Sigma'

Description

Extract the estimated standard deviation of the errors, the “residual standard deviation” (also misnamed the “residual standard error”), from a fitted model.

Usage

## S3 method for class 'merMod'
sigma(object, ...)

Arguments

`object`	a fitted model.
`...`	additional, optional arguments, passed from or to methods. (None currently in our two methods.)

Details

Package lme4 provides methods for mixed-effects models of class merMod and lists of linear models, lmList4.

Value

Typically a number, the estimated standard deviation of the errors (“residual standard deviation”) for Gaussian models, and - less interpretably - the square root of the residual deviance per degree of freedom in more general models.

Examples

methods(sigma)# from R 3.3.0 on, shows methods from pkgs 'stats' *and* 'lme4'

lme4

Linear Mixed-Effects Models using 'Eigen' and S4

v1.1-26

GPL (>= 2)

Authors

Douglas Bates [aut] (<https://orcid.org/0000-0001-8316-9503>), Martin Maechler [aut] (<https://orcid.org/0000-0002-8685-9910>), Ben Bolker [aut, cre] (<https://orcid.org/0000-0002-2127-0443>), Steven Walker [aut] (<https://orcid.org/0000-0002-4394-9078>), Rune Haubo Bojesen Christensen [ctb] (<https://orcid.org/0000-0002-4494-3399>), Henrik Singmann [ctb] (<https://orcid.org/0000-0002-4842-3657>), Bin Dai [ctb], Fabian Scheipl [ctb] (<https://orcid.org/0000-0001-8172-3603>), Gabor Grothendieck [ctb], Peter Green [ctb] (<https://orcid.org/0000-0002-0238-9852>), John Fox [ctb], Alexander Bauer [ctb], Pavel N. Krivitsky [ctb, cph] (<https://orcid.org/0000-0002-9101-3362>, shared copyright on simulate.formula)

Initial release