| EMM {ExtMallows} | R Documentation |
An extended Mallows model for aggregating multiple ranking lists
Description
It uses the extended Mallows model to aggregate multiple full/partial ranking lists.
Usage
EMM(rankings, initial.method, it.max)
Arguments
rankings |
A n by m matrix, with each column representing a ranking list, which ranks the items from the most preferred to the least preferred. For missing items, use 0 to denote them. |
initial.method |
the method for initializing the value of pi0, with four options: mean, median, geometric and random (the mean of three randomly sampled ranking lists). By default, initial.method="mean". |
it.max |
the maximum number of iterations. By default, it.max=20. |
Value
op.phi |
optimal value of phi |
op.omega |
optimal value of omega |
op.alpha |
optimal value of alpha |
op.pi0 |
optimal value of pi0, ranking the items from the most preferred to the least preferred |
max.logL |
maximum value of log-likelihood |
Author(s)
Han Li, Minxuan Xu, Jun S. Liu and Xiaodan Fan
References
An extended Mallows model for ranked data aggregation
Examples
data(simu1)
res=EMM(rankings = simu1, initial.method = "mean", it.max = 20)
res$op.phi
res$op.omega
res$op.pi0