rankdist (version 1.0.0)

RankData-class: RankData Class

Description

A S4 class to represent ranking data It is well understood that the ranking representation and ordering representation of ranking data can easily get confused. I thus use a S4 class to store all the information about the ranking data. This can avoid unnecessary confusions.

Details

It is possible to store both complete and top-q rankings in the same RankData object. Three slots topq, subobs, and q_ind are introduced for this purpose. Note that there is generally no need to specify these slots if your data set only contains a single "q" level (for example all data are top-10 rankings). The "q" level for complete ranking should be nobj-1. Moreover, if the rankings are organized in chunks of increasing "q" levels (for example, top-2 rankings followed by top-3 rankings followed by top-5 rankings etc.), then slots subobs, and q_ind can also be inferred correctly by the initializer. Therefore it is highly recommender that you organise the ranking matrix in this way and utilize the initializer.

See Also

RankInit, RankControl

Examples

# creating a data set with only complete rankings
rankmat <- replicate(10,sample(1:52,52), simplify = "array")
countvec <- sample(1:52,52,replace=TRUE)
rankdat <- new("RankData",ranking=rankmat,count=countvec)
# creating a data set with both complete and top-10 rankings
rankmat_in <- replicate(10,sample(1:52,52), simplify = "array")
rankmat_in[rankmat_in>11] <- 11
rankmat_total <- cbind(rankmat_in, rankmat)
countvec_total <- c(countvec,countvec)
rankdat2 <- new("RankData",ranking=rankmat_total,count=countvec_total, nobj=52, topq=c(10,51))