March 2016
Beginner to intermediate
340 pages
7h 20m
English
Content preview from R Machine Learning By ExampleBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Evaluating a product contingency matrix
We will be doing a couple of things here. First, we will analyze a small toy dataset belonging to a supermarket, by using a product contingency matrix of product pair purchases based on their frequency. Then we will move on to contingency matrices based on other metrics such as support, lift, and so on by using another dataset.
The data for our first matrix consists of the six most popular products sold at the supermarket and also the number of times each product was sold by itself and in combination with the other products. We have the data in the form of a data table captured in a csv file, as you can see in the following figure:
To analyze this data, we first need to understand what it depicts. Basically, ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.