node-arff

ARFF data file tools

npm install node-arff
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ARFF Tools for node.js

See the WEKA wiki for details on the file format.

Usage

First, install node.js and get the node-arff NPM module using npm:

$ npm install node-arff

Then, get yourself an ARFF file (http://axon.cs.byu.edu/data/ has a few) to read.

var arff = require('node-arff');

arff.load('data/some-file.arff', function(err, data) {
  if (err) {
    return console.error(err);
  }
  // find out some info about the field "age"
  var oldest = data.max('age');
  var youngest = data.min('age');
  var mostcommon = data.mode('age');
  var average = data.mean('age');

  // normalize the data (scale all numeric values so that they are between 0 and 1)
  data.normalize();

  // randomly sort the data
  data.randomize();
})
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