patt.worth {prefmod}R Documentation

Function to calculate and print worth parameters from pattern model results

Description

Worth parameter are calculated from the results of a pattern model fit. The resulting estimates for all groups are based on the subject covariates as specified in the model formula (formel) of a pattern model.

Usage

patt.worth(obj, obj.names = NULL)

Arguments

obj Object of class pattMod obtained from pattern model fit.
obj.names names for the objects, for repeated measurement models just the names of objects for the first time point

Value

patt.worth returns an object of class pattW, which is in fact the matrix . of worth parameters for all groups appropriately labelled. The function print (i.e., print.pattW) can be used to print the matrix, the function plotworth gives a plot of the estimates. The matrix itself can be obtained by using unclass.

Author(s)

Reinhold Hatzinger

Examples

    ## fit only first three objects with SEX effect
    data(cemspc)
    m2<-pattPC.fit(cemspc, nitems=3, formel=~SEX, elim=~SEX, undec=TRUE)

    ## calculate and print worth parameters
    m2worth<-patt.worth(m2)
    m2worth

    ## display the transpose of the worth parameter matrix
    t(unclass(m2worth))

[Package prefmod version 0.8-13 Index]