# Simhash
An Elixir implementation of [Moses Charikar's](http://www.cs.princeton.edu/courses/archive/spring04/cos598B/bib/CharikarEstim.pdf) Simhash.
## Examples
```elixir
iex> Simhash.similarity("Universal Avenue", "Universe Avenue")
0.71875
iex> Simhash.similarity("hocus pocus", "pocus hocus")
0.8125
iex> Simhash.similarity("Sankt Eriksgatan 1", "S:t Eriksgatan 1")
0.8125
iex> Simhash.similarity("Purple flowers", "Green grass")
0.5625
```
By default trigrams (N-gram of size 3) are used as language features, but you can set a different N-gram size:
```elixir
iex> Simhash.similarity("hocus pocus", "pocus hocus", 1)
1.0
iex> Simhash.similarity("Sankt Eriksgatan 1", "S:t Eriksgatan 1", 6)
0.859375
iex> Simhash.similarity("Purple flowers", "Green grass", 6)
0.546875
```
## Installation
The package can be installed as:
1. Add simhash to your list of dependencies in `mix.exs`:
def deps do
[{:simhash, "~> 0.1.1"}]
end
2. Ensure simhash is started before your application:
def application do
[applications: [:simhash]]
end