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, i.e., from pattPC.fit, pattR.fit, pattL.fit, and pattLrep.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, outmat = "worth")

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
outmat a matrix of estimated worth parameters (outmat = "worth", the default) or pattern model parameters (outmat = "lambda").

Value

patt.worth returns a matrix of worth or model parameters. If subject covariates have been specified, each column represents a groups defined by the crossclassification of the subject covariates.
The function plotworth gives a plot of the estimates.

Author(s)

Reinhold Hatzinger

See Also

pattPC.fit, pattR.fit, pattL.fit, and pattLrep.fit, plotworth

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

[Package prefmod version 0.8-16 Index]