| llbt.worth {prefmod} | R Documentation |
Worth parameter are calculated from the results of an LLBT model fit, i.e., from
llbtPC.fit.
The resulting estimates for all groups are based on the subject covariates as
specified in the model formula (formel) of the LLBT model.
llbt.worth(obj, obj.names = NULL, outmat = "worth")
obj |
Object of class llbtMod obtained from an LLBT model fit, i.e.,
llbtPC.fit. |
obj.names |
names for the objects. If NULL, the names as specified
in obj are used. |
outmat |
a matrix of estimated worth parameters (outmat = "worth", the default) or
LLBT model parameters (outmat = "lambda"). |
llbt.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.
Reinhold Hatzinger
## fit only first three objects with SEX effect
data(cemspc)
m2<-llbtPC.fit(cemspc, nitems=3, formel=~SEX, elim=~SEX, undec=TRUE)
## calculate and print worth parameters
m2worth<-llbt.worth(m2)
m2worth