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, \dots)
Arguments
object
a fitted model.
...
additional, optional arguments, passed from or to
methods. (None currently in our two methods.)
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.
Details
Package lme4 provides methods for mixed-effects models of class
merMod and lists of linear models, lmList4.