sigma | R Documentation |
Extract the estimated standard deviation of the errors, the “residual standard deviation” (misnomed also “residual standard error”) from a fitted model.
## S3 method for class 'lmrob'
sigma(object, ...)
object |
a fitted model. |
... |
additional, optional arguments. (None are used in our methods) |
For R <= 3.2.x
, we provide an (S3) generic function (as e.g.,
package lme4) and methods for lmrob
,
nlrob
, and nls
.
From R >= 3.3.0
, we provide methods for our
lmrob
and nlrob
models.
the residual standard error as a scalar
m.cl <- lm (Y ~ ., data=coleman)
if(getRversion() >= "3.3.0") sigma(m.cl) else summary(m.cl)$sigma
sigma( m1 <- lmrob(Y ~ ., data=coleman) )
sigma( m2 <- lmrob(Y ~ ., data=coleman, setting = "KS2014") )
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