Description Usage Arguments Value Author(s) References

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

1 2 | ```
UpdateLambda(r, R, z, G, dists.to.Rg, dists.table,
top.bound = 1000)
``` |

`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. |

Vector of new lambda parameters for the clusters.

Erik Gregory

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

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