How to create a classifier using the nodejs wrapper

create-classifier.js

'use strict';

var watson = require('../nodejs-wrapper/lib/index');
var fs = require('fs');

var natural_language_classifier = watson.natural_language_classifier({
  url: 'https://gateway.watsonplatform.net/natural-language-classifier/api',
  username: 'USERNAME',
  password: 'PASSWORD',
  version: 'v1'
});

// Classifiers can be created using a string, csv stream or json object

// 1. string
var csv = fs.readFileSync('./training_data.csv');

// 2. stream - util for large files
var stream = fs.createReadStream('./training_data.csv');

// 3. json - converted to csv
var json = [
  { text: 'text 1', classes: ['class1','class2'] },
  { text: 'text 2', classes: ['class1'] },
  //...
];


var params = {
  language: 'en',
  name: 'my-json-classifier',
  training_data: json //replace with stream or csv
};

natural_language_classifier.create(params, function(err, response) {
  if (err)
    console.log(err);
  else
    console.log(JSON.stringify(response, null, 2));
});

• The training_data.csv file can be found here.
• When creating a classifier using json make sure you have more than 5 training elements.