9. A Recommender System | Microsoft Azure Machine Learning

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Microsoft Azure Machine Learning

By : Sumit Mund

4 (5)

Microsoft Azure Machine Learning

4 (5)

By: Sumit Mund

Overview of this book

The book is intended for those who want to learn how to use Azure Machine Learning. Perhaps you already know a bit about Machine Learning, but have never used ML Studio in Azure; or perhaps you are an absolute newbie. In either case, this book will get you up-and-running quickly.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Introduction

1. Introduction

Introduction to predictive analytics

Machine learning

Introduction to Azure Machine Learning

Summary

2. ML Studio Inside Out

2. ML Studio Inside Out

Introduction to ML Studio

Getting started with Microsoft Azure

Inside ML Studio

Workspace as a collaborative environment

Summary

3. Data Exploration and Visualization

3. Data Exploration and Visualization

The basic concepts

Data exploration in ML Studio

Do it yourself

Summary

4. Getting Data in and out of ML Studio

4. Getting Data in and out of ML Studio

Getting data in ML Studio

Data format conversion

Getting data from ML Studio

Summary

5. Data Preparation

5. Data Preparation

Data manipulation

Splitting data

Do it yourself

The Apply SQL Transformation module

Advanced data preprocessing

Summary

6. Regression Models

6. Regression Models

Understanding regression algorithms

Train, score, and evaluate

Linear regression

Optimizing parameters for a learner – the sweep parameters module

The train neural network regression – do it yourself

Comparing models with the evaluate model

Other regression algorithms

No free lunch

Summary

7. Classification Models

7. Classification Models

Understanding classification

Training, scoring, and evaluating modules

Classifying diabetes or not

Predicting adult income with decision-tree-based models

Do it yourself – comparing models to choose the best

Multiclass classification

Multiclass classification with the Iris dataset

Multiclass classification with the Wine dataset

Summary

8. Clustering

8. Clustering

Understanding the K-means clustering algorithm

Creating a K-means clustering model using ML Studio

Do it yourself

Clustering versus classification

Summary

9. A Recommender System

9. A Recommender System

The Matchbox recommender

Building a recommendation system

Summary

10. Extensibility with R and Python

10. Extensibility with R and Python

Introduction to R

Introduction to Python

Why should you extend through R/Python code?

Extending experiments using the Python language

Extending experiments using the R language

Summary

11. Publishing a Model as a Web Service

11. Publishing a Model as a Web Service

Preparing an experiment to be published

Creating a scoring experiment

Specifying the input and output of the web service

Publishing a model as a web service

Consuming a published web service

Web service configuration

Updating the web service

Summary

12. Case Study Exercise I

12. Case Study Exercise I

Problem definition and scope

The dataset

Data exploration and preparation

Model development

Model deployment

Summary

13. Case Study Exercise II

13. Case Study Exercise II

Problem definition and scope

The dataset

Data exploration and preparation

Model development

Model deployment

Summary

Index

Index

The Matchbox recommender

Microsoft has developed a large-scale recommender system based on a probabilistic model (Bayesian) called Matchbox. This model can learn about a user's preferences through observations made on how they rate items, such as movies, content, or other products. Based on those observations, it recommends new items to the users when requested.

Matchbox uses the available data for each user in the most efficient way possible. The learning algorithm it uses is designed specifically for big data. However, its main feature is that Matchbox takes advantage of metadata available for both users and items. This means that the things it learns about one user or item can be transferred across to other users or items.

You can find more information about the Matchbox model at the Microsoft Research project link.

Types of recommendations

The Matchbox recommender supports the building of four kinds of recommenders, which will include most of the scenarios. Let's take a look at the following...

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