sigma
Extract Residual Standard Deviation
Description
Returns the standard deviation of the residuals of the model.
Usage
sigma(object, ...)
## Default S3 method:
sigma(object, use.fallback = TRUE, ...)
Arguments
| object |
a fitted model object.
|
| use.fallback |
a logical argument passed to function nobs.default to get the number
of observations from a fit. See nobs for its detail.
|
| ... |
additional arguments to be passed to future methods of this generic function.
|
Details
sigma is an S3 generic function to compute the estimated standard deviation of
the residuals of the model. Currently, the default method handles linear
and generalized linear models.
Value
Returns the estimated standard deviation of the residuals of the model.
See Also
Examples
fit <- lm(y ~ ., data=Sdatasets::freeny)
sigma(fit)
sigma( lm(Fuel ~ Weight -1, data=Sdatasets::fuel.frame), use.fallback = FALSE )