Extract Pooled Standard Deviation
Usage
pooledSD(object)
Arguments
object
|
an object inheriting from class lmList .
|
Description
The pooled estimated standard deviation is obtained by adding together
the residual sum of squares for each non-null element of
object
, dividing by the sum of the corresponding residual
degrees-of-freedom, and taking the square-root.Value
the pooled standard deviation for the non-null elements of
object
, with an attribute df
with the number of
degrees-of-freedom used in the estimation.Author(s)
Jose Pinheiro and Douglas BatesSee Also
lmList
, lm
Examples
library(lme)
data(Orthodont)
fm1 <- lmList(Orthodont)
pooledSD(fm1)