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 merMod
sigma(object, ...)

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.

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.