Node.js decision-tree package

The decision-tree package is an example of a machine learning package. It is available at https://www.npmjs.com/package/decision-tree . The package is installed using the following command:

npm install decision-tree

We need a dataset to use for training/developing our decision tree. I am using the car MPG dataset on this page: https://alliance.seas.upenn.edu/~cis520/wiki/index.php?n=Lectures.DecisionTrees . It did not seem to be available directly, so I copied it into Excel and saved it as a local CSV.

The logic for machine learning is very similar:

• Load our dataset

• Split into a training set and a testing set

• Use the training set to develop our model

• Test the mode on the test set.

Tip

Typically, you might use two-thirds of your data for training and one-third for testing.

Using the decision-tree package and the car MPG dataset we would have a script similar to the following:

//Import the modules
var DecisionTree = require('decision-tree');
var fs = require("fs");...