inibest | R Documentation |
Compute preliminary parameter estimates of a CUB model without covariates for given ordinal responses. These preliminary estimators are used within the package code to start the E-M algorithm.
inibest(m,freq)
m |
Number of ordinal categories |
freq |
Vector of the absolute frequencies of given ordinal responses |
A vector (\pi,\xi)
of the initial parameter estimates for a CUB model without covariates,
given the absolute frequency distribution of ordinal responses
Iannario M. (2009). A comparison of preliminary estimators in a class of ordinal data models,
Statistica & Applicazioni, VII, 25–44
Iannario M. (2012). Preliminary estimators for a mixture model of ordinal data,
Advances in Data Analysis and Classification, 6, 163–184
inibestgama
m<-9
freq<-c(10,24,28,36,50,43,23,12,5)
estim<-inibest(m,freq)
pai<-estim[1]
csi<-estim[2]
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