Math::DistanceFunctions

Raku package with a collection of mathematical distance functions and a corresponding role.

The content of this package was "factored out" from "ML::Clustering", [AAp1].

Faster versions of these functions are implemented in "Math::DistanceFunctions::Native", [AAp2].

A special package has the "edit distance" (aka Damerau-Levenshtein distance) -- see "Math::DistanceFunctions::Edit", [AAp3].

Installation

From Zef ecosystem:

zef install Math::DistanceFunctions

From GitHub:

zef install https://github.com/antononcube/Raku-Math-DistanceFunctions.git

Usage examples

use Math::DistanceFunctions;

my @v1 = 10.rand xx 10;
my @v2 = 2.rand xx 10;

my @funcs = [
    :&bray-curtis-distance,
    :&canberra-distance,
    :&chessboard-distance,
    :&cosine-distance,
    :&dot-product,
    :&euclidean-distance,
    :&hamming-distance,
    :&manhattan-distance,
    :&squared-euclidean-distance
];

for @funcs -> $p {
    say "{$p.key} : {$p.value.(@v1, @v2)}";
}

# bray-curtis-distance : 0.6151407918691146
# canberra-distance : 5.824952422823202
# chessboard-distance : 8.570769750374787
# cosine-distance : 0.10484766994026384
# dot-product : 65.06821530189765
# euclidean-distance : 14.296040411329631
# hamming-distance : 10
# manhattan-distance : 38.15520204868512
# squared-euclidean-distance : 204.37677144236991

References

[AAp1] Anton Antonov, ML:Clustering Raku package, (2022), GitHub/antononcube.

[AAp2] Anton Antonov, Math::DistanceFunctions::Edit Raku package, (2024), GitHub/antononcube.

[AAp3] Anton Antonov, Math::DistanceFunctions::Native Raku package, (2024), GitHub/antononcube.