phyclust (version 0.1-22)

.boundary.method: Boundary Methods for Population Proportions

Description

Methods used in EM Algorithms to deal with boundary problems of population proportions, \(\eta_k\). The first element is the default value. This is a read-only object and the elemental order is followed in C.

Usage

.boundary.method

Arguments

Format

A character vector contains implemented boundary methods in C.

Details

The boundary value 0 of the population proportions makes the log likelihood as -Inf. Since degeneracy of subpopulations can affect the maximizing processes in EM steps. This problem is usually caused by bad initializations, and may suggest that number of cluster \(K\) may be too large.

Two methods have been implemented when any \(\eta_k\) less than the lower bound (\(1/N\) or \(1e-16\)). The ADJUST (default) will adjust the \(\eta_k\) to the lower bound, and the IGNORE will stop the iterations and return errors.

References

Phylogenetic Clustering Website: http://snoweye.github.io/phyclust/

See Also

.show.option, .init.procedure, .init.method, .EMControl, phyclust.

Examples

Run this code
# NOT RUN {
library(phyclust, quiet = TRUE)

.boundary.method
# }

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