Node-FPGrowth

FPGrowth Algorithm frequent itemset mining algorithm implementation in TypeScript / JavaScript.

Getting Started

Installing

This is a Node.js module available through the npm registry.

Installation is done using the npm install command:

npm install --save node-fpgrowth

Example of use

In your TypeScript project, import and use FPGrowth as follows. Same example with a JavaScript syntax is available here.

import { FPGrowth, Itemset } from 'node-fpgrowth';

let transactions: number[][] = [
    [1,3,4],
    [2,3,5],
    [1,2,3,5],
    [2,5],
    [1,2,3,5]
];

// Execute FPGrowth with a minimum support of 40%. Algorithm is generic.
let fpgrowth: FPGrowth<number> = new FPGrowth<number>(.4);

// Returns itemsets 'as soon as possible' through events.
fpgrowth.on('data', (itemset: Itemset<number>) => {
    // Do something with the frequent itemset.
    let support: number = itemset.support;
    let items: number[] = itemset.items;
});

// Execute FPGrowth on a given set of transactions.
fpgrowth.exec(transactions)
    .then( (itemsets: Itemset<number>[]) => {
      // Returns an array representing the frequent itemsets.
    });

Node-FPGrowth is compatible with browserify and webpack. Alternatively, you can import/serve the browserified fpgrowth-client.js file found in the dist folder:

<script src="./dist/fpgrowth-client.js"></script>
<script>
  var transactions = [
      [1, 3, 4],
      [2, 3, 5],
      [1, 2, 3, 5],
      [2, 5],
      [1, 2, 3, 5]
  ];

  var fpg = new fpgrowth.FPGrowth(.4);

  fpg.exec(transactions, function (itemsets) {
      console.log(`Finished executing FPGrowth. ${itemsets.length} frequent itemset(s) were found.`);
  });
</script>

Building from source

Clone this repository:

git clone https://github.com/alexisfacques/Node-FPGrowth.git
cd Node-FPGrowth

Install the project's dependencies with:
```
npm install
```
Compile the module's sources to executable JavaScript:
```
npm run tsc
```
This should run the example bundled with the module:
```
npm test
```
This should recreate a browserified version, ./dist/fpgrowth-client.js, of the module:
```
npm run browserify
```

License