Reciprocal rank fusion (Kamath Ch 7)

sum_r 1/(k + rank_r(d)); documents missing from a list simply score nothing there. Ties break on the document label.

Usage

morie_kamath_reciprocal_rank_fusion(rankings, k = 60)

Arguments

rankings

List of ranked id vectors.

k

Damping constant.

Value

List with ranking, scores, appearances.

Examples

V <- c(1, 2, 3, 4, 5, 6, 7, 8)
morie_kamath_reciprocal_rank_fusion(V)
#> $ranking
#> [1] "1" "2" "3" "4" "5" "6" "7" "8"
#> 
#> $scores
#>          1          2          3          4          5          6          7 
#> 0.01639344 0.01639344 0.01639344 0.01639344 0.01639344 0.01639344 0.01639344 
#>          8 
#> 0.01639344 
#> 
#> $appearances
#> 1 2 3 4 5 6 7 8 
#> 1 1 1 1 1 1 1 1 
#> 
#> $n_rankers
#> [1] 8
#> 
#> $n_documents
#> [1] 8
#> 
#> $estimate
#>          1 
#> 0.01639344 
#> 
#> $k
#> [1] 60
#> 
#> $n
#> [1] 8
#> 
#> $method
#> [1] "Reciprocal rank fusion sum 1/(k + rank)"
#>