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frankly
2010 Apr 23
0
A distance measure between top-k list
...st of top 20 students chosen by each judge.
The following paper gives out a few measures for such problem
www.almaden.ibm.com/cs/people/fagin/topk.pdf
Now I have written the code for the kendal's - measure of distance
here is the code
topklist <- function(df1,df2,matchby="name",rankby="pat",p=0.5,
normalize=TRUE){
library(gtools)
df1$rank <- rank(-df1[,rankby],ties.method="first")
df2$rank <- rank(-df2[,rankby],ties.method="first")
dftmp <- merge(df1,df2,matchby,all=TRUE)
rownames(dftmp) <- dftmp[,matchby]
df <- combinations(length(df...