sigma | R Documentation |
Extract the estimated standard deviation of the errors, the “residual standard deviation” (also misnamed the “residual standard error”), from a fitted model.
## S3 method for class 'merMod'
sigma(object, ...)
object |
a fitted model. |
... |
additional, optional arguments, passed from or to methods. (None currently in our two methods.) |
Package lme4 provides methods for mixed-effects models of class
merMod
and lists of linear models, lmList4
.
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.
methods(sigma)# from R 3.3.0 on, shows methods from pkgs 'stats' *and* 'lme4'
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