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 Bates

See Also

lmList, lm

Examples

library(lme)
data(Orthodont)
fm1 <- lmList(Orthodont)
pooledSD(fm1)


[Package Contents]