FAST algorithm to find consensus (median) ranking.

FAST algorithm to find consensus (median) ranking defined by Amodio, D'Ambrosio and Siciliano (2016). It returns at least one of the solutions. If there are multiple solutions, sometimes it returns all the solutions, sometimes it returns some solutions, always it returns at least one solution.

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`X` |
is a ranking data matrix |

`Wk` |
is a vector of weights |

`maxiter` |
maximum number of iterations: default = 50. |

`FULL` |
Default FULL=FALSE. If FULL=TRUE, the searching is limited to the space of full rankings. |

`PS` |
Default PS=FALSE. If PS=TRUE the number of current iteration is diplayed |

a "list" containing the following components:

Consensus | the Consensus Ranking | |

Tau | averaged TauX rank correlation coefficient | |

Eltime | Elapsed time in seconds |

Antonio D'Ambrosio antdambr@unina.it and Sonia Amodio sonia.amodio@unina.it

Amodio, S., D'Ambrosio, A. and Siciliano, R. (2016). Accurate algorithms for identifying the median ranking when dealing with weak and partial rankings under the Kemeny axiomatic approach. European Journal of Operational Research, 249(2), 667-676.

`EMCons`

Emond and Mason branch-and-bound algorithm.

`QuickCons`

Quick algorithm.

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