https://github.com/seniverse/vptree

An Erlang implementation of vantage point tree.
https://github.com/seniverse/vptree

erlang-library vantage-point-tree

Last synced: 13 days ago
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An Erlang implementation of vantage point tree.

• Host: GitHub
• URL: https://github.com/seniverse/vptree
• Owner: seniverse
• License: apache-2.0
• Created: 2019-07-12T10:56:26.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2019-07-12T11:05:16.000Z (almost 6 years ago)
• Last Synced: 2024-09-17T20:07:33.163Z (8 months ago)
• Topics: erlang-library, vantage-point-tree
• Language: Erlang
• Homepage:
• Size: 6.84 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
## vptree

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An Erlang implementation of vantage point tree.

### Usage

Define a distance function

```

1> Distance = fun({X1,Y1},{X2,Y2}) -> X = X2-X1, Y = Y2-Y1, math:sqrt(X*X+Y*Y) end.

```

Create vantage point tree from a list of points

```

2> Tree = vptree:from_list(Distance, [{{0.0, 0.0}, a}, {{1.0, 1.0}, b}]).

```

Find nearest point within a given distance

```

3>  vptree:search(Distance, {0.2,0.2}, 100.0, not_found, Tree).

a

4> vptree:search(Distance, {0.2,0.2}, 0.1, not_found, Tree).  

not_found

```

### Installation

add `vptree` dependency to your project's `rebar.config`

```

{deps, [vptree]}.

```

### License

vptree is released under Apache 2 License. Check [LICENSE](./LICENSE) file for more information.