pbkrtest (version 0.4-0)

get_ddf_Lb: Adjusted denomintor degress freedom for linear estimate for linear mixed model.

Description

Get adjusted denomintor degress freedom for testing L'beta=0 in a linear mixed model.

Usage

get_ddf_Lb(object, Lcoef)
ddf_Lb(VVa, Lcoef, VV0=VVa)

Arguments

object

A linear mixed model object.

Lcoef

A vector with the same length as fixef(object)

VVa, VV0

Adjusted and unadjusted covariance matrix for the fixed effects parameters. Adjusted covariance matrix is obtained with vcovAdj() and the unadjusted with vcov().

Value

• Adjusted degrees of freedom (adjusment made by a Kenward-Roger approximation).

References

Ulrich Halekoh, S�ren H�jsgaard (2014)., A Kenward-Roger Approximation and Parametric Bootstrap Methods for Tests in Linear Mixed Models - The R Package pbkrtest., Journal of Statistical Software, 58(10), 1-30., http://www.jstatsoft.org/v59/i09/

See Also

KRmodcomp vcovAdj

Examples

## To be written