Hey Jana Your blogs are glittering like bright stars which gives us to be a wise person. It’s getting Gold from dust if you know how to get that Gold.
I buy a lot of books from amazon.com. You can view my online bookshelf here. One of the reasons I like amazon.com is because of its recommendations engine. Few days back it recommended me the book Thinking Fast and Slow. It is one of my favorite books.
It not only recommended the book but it also told me why it recommended the book. Since I rated the book The signal and the noise it recommended me the book Thinking Fast and Slow
I got curious and wanted to understand how amazon does it. In this post I will explain the basic idea behind this recommendation.
Let us imagine that amazon has only 5 users and 5 books. The table given below contains the ratings of each user in the scale of 1 to 5. If the user has not rated the book then I have left the value as…
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