df_des_cfa | R Documentation |
Calculates the degrees of freedom based on an designmatrix for a (log liniear) CFA model.
df_des_cfa(des)
des |
a designmatrix (object of class "matrix") as returned by function |
No details
An object of class "integer" giving the degrees of freedom for the designmatrix defined in argument des
.
No references in the moment
####################################### # degrees of freedom for designmatrix with three main effects. # three variables with two categories each. df_des_cfa(design_cfg_cfa(kat=c(2,2,2))) # two variables with two categories each and one variable # with 7 categories (e.g. The Krauth & Lienert suicide Data). df_des_cfa(design_cfg_cfa(kat=c(2,2,7))) ########### # degrees of freedom for designmatrix with three main effects # and three 'two by two'interactions. # and tripple interaction --> saturated model --> df=0 # three variables with two categories each. df_des_cfa(design_cfg_cfa(kat=c(2,2,2),form="~ V1 + V2 + V3 + V1:V2 + V1:V3 + V2:V3 + V1:V2:V3")) #######################################
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