BBFULL: Branch-and-Bound algorithm to find the median ranking in the...

Description Usage Arguments Details Value Author(s) References See Also Examples

View source: R/ALL.r View source: R/BBFULL.R

Description

Branch-and-bound algorithm to find consensus ranking as definned by D'Ambrosio et al. (2015). If the number of objects to be ranked is large (greater than 20 or 25), it can work for very long time. Use either QuickCons or FASTcons with the option FULL=TRUE instead

Usage

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BBFULL(X, Wk = NULL, PS = TRUE)

Arguments

X

A N by M data matrix, in which there are N judges and M objects to be judged. Each row is a ranking of the objects which are represented by the columns. The data matrix can contain both full and tied rankings, or incomplete rankings. Alternatively X can contain the rankings observed only once. In this case the argument Wk must be used

Wk

Optional: the frequency of each ranking in the data

PS

If PS=TRUE, on the screen some information about how many branches are processed are displayed

Details

If the objects to be ranked is large (>25 - 30), it can take long time to find the solutions

Value

a "list" containing the following components:

Consensus the Consensus Ranking
Tau averaged TauX rank correlation coefficient
Eltime Elapsed time in seconds

Author(s)

Antonio D'Ambrosio antdambr@unina.it

References

D'Ambrosio, A., Amodio, S., and Iorio, C. (2015). Two algorithms for finding optimal solutions of the Kemeny rank aggregation problem for full rankings. Electronic Journal of Applied Statistical Analysis, 8(2), 198-213.

See Also

FASTcons FAST algorithm algorithm.

QuickCons Quick algorithm.

Examples

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ConsRank documentation built on May 30, 2017, 3:05 a.m.