The second example – a recommendation system
A recommendation system recommends a product or a service to a customer based on the products/services he has bought/used and on the products/services bought/used by the users that have bought/used the same services as him.
We have used the example explained in the previous section to implement a recommendation system. Each description of a product includes the reviews of a number of customers to a product. This review includes the score the customer gives to the product.
In this example, you will use these reviews to get a list of the products that may be interesting to a customer. We will obtain the list of the products purchased by a customer. In order to get that list, a list of the users who have ...