abd (version 0.1-21)

varcomps: Variance Components

Description

Extract variance components from a mixed-model ANOVA (i.e., fit with + Error(...)).

Usage

varcomps(fm, n)

Arguments

fm

an fitted model of class aov

n

an integer giving the within-group sample size

Value

• varcomps returns a list of class varcomps with the following components:
• MS.groups
  Group mean square
• MS.error
  Error mean square
• F
  F-statistic
• df1
  Numerator degrees of freedom
• df2
  Denominator degrees of freedom
• p
  p-value
• var.within
  Within-group variance; equals MS.error
• var.among
  Among group variance

See Also

repeatability

Examples

data(WalkingStickFemurs)
aovfit <- aov(femur.length ~ 1 + Error(specimen), data = WalkingStickFemurs)
vc <- varcomps(aovfit, n = 2)
vc
R.varcomps <- repeatability(vc)
R.varcomps