R: Update the Lambda parameters of clusters.

UpdateLambda {RMallow} | R Documentation

## Update the Lambda parameters of clusters.

### Description

Updates the Lambda parameters to maximize the likelihood of the data under Mallows' model.

### Usage

      UpdateLambda(r, R, z, G, dists.to.Rg, dists.table,
        top.bound = 1000)

### Arguments

`r` | Matrix of partial rankings.
`R` | Current modal sequences.
`z` | Current probabilities of memberships in each cluster.
`G` | Number of modal sequences.
`dists.to.Rg` | Matrix of the distances between the data and the current modal sequences.
`dists.table` | Table of the distance distribution in N! space, under Kendall's metric.
`top.bound` | The maximum value for the lambda parameter.

### Value

Vector of new lambda parameters for the clusters.

### Author(s)

Erik Gregory

### References

"Mixtures of distance-based models for ranking data". Thomas Brendan Murphy & Donal Martin. 1 April 2002. Computational Statistics & Data Analysis 41 (2003) 645-655.

[Package RMallow version 1.0 Index]