pooledSD {lme4}R Documentation

Extract pooled standard deviation

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.

Usage

pooledSD(object)

Arguments

object an object inheriting from class lmList.

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.

See Also

lmList, lm

Examples

pooledSD(lmList(weight ~ Time | Chick, do.call("data.frame", ChickWeight)))

[Package lme4 version 0.99875-9 Index]