blockcluster (version 1.01)

cocluststrategy: Strategy function

Description

This function is used to set all the parameters for coclustering. It returns an object of class strategy which can be given as input to cocluster function.

Usage

cocluststrategy(algo = "XEMStrategy",
    initmethod = character(), stopcriteria = "Parameter",
    nbiterationsxem = 50, nbiterationsXEM = 500,
    nbinititerations = 10, initepsilon = 0.01,
    nbiterations_int = 5, epsilon_int = 0.01,
    epsilonxem = 1e-04, epsilonXEM = 1e-10, nbtry = 2,
    nbxem = 5)

Arguments

algo

The valid values for this parameter are "XEMStrategy" (Default) and "XCEMStrategy".This parameter sets the algorithm/strategy to run the model. The algorithms used are BEM (Block EM algorithm) for "XEMStrategy" and BCEM (Block classification EM

stopcriteria

It specifies the stopping criteria. It can be based on either relative change in parameters vaule or relative change in log-likelihood. Valid criterian values are "Parameter" and "Likelihood". Default criteria is "Parameter".

initmethod

Method to initialize model paramteres. The valid values are "CEMInit", "FuzzyCEMInit" and "RandomInit". For now only one kind of initialization exist for every model currently available in the package. Hence default value for initialization is set

nbinititerations

Number of Global iterations used in initialization step. Default value is 10.

initepsilon

Tolerance value used while initialization. Default value is 1e-2.

nbiterations_int

Number of iterations for internal E step. Default value is 5.

epsilon_int

Tolerance value for relative change in Parameter/likelihood for internal E-step. Default value is 1e-2.

nbtry

Number of tries (XEM steps). Default value is 2.

nbxem

Number of xem steps. Default value is 5.

nbiterationsxem

Number of EM iterations used during xem step. Default value is 50.

nbiterationsXEM

Number of EM iterations used during XEM step. Deafault value is 500.

epsilonxem

Tolerance value used during xem step. Default value is 1e-4.

epsilonXEM

Tolerance value used during XEM step. Default value is 1e-10

Value

• Object of class strategy

Examples

#Default strategy values

strategy<-cocluststrategy()
summary(strategy)