Book Image

Practical Predictive Analytics

By : Ralph Winters
Book Image

Practical Predictive Analytics

By: Ralph Winters

Overview of this book

This is the go-to book for anyone interested in the steps needed to develop predictive analytics solutions with examples from the world of marketing, healthcare, and retail. We'll get started with a brief history of predictive analytics and learn about different roles and functions people play within a predictive analytics project. Then, we will learn about various ways of installing R along with their pros and cons, combined with a step-by-step installation of RStudio, and a description of the best practices for organizing your projects. On completing the installation, we will begin to acquire the skills necessary to input, clean, and prepare your data for modeling. We will learn the six specific steps needed to implement and successfully deploy a predictive model starting from asking the right questions through model development and ending with deploying your predictive model into production. We will learn why collaboration is important and how agile iterative modeling cycles can increase your chances of developing and deploying the best successful model. We will continue your journey in the cloud by extending your skill set by learning about Databricks and SparkR, which allow you to develop predictive models on vast gigabytes of data.
Table of Contents (19 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

Logistic regression

A very popular use of GLM is via logistic regression. This is the type of regression to use when your target variable is a binary value, that is, it can only take on two values. These two binary values usually take the form:

  • Something occurred (binary value = 1)
  • Something did not occur (binary value = 0)

These two values typically vary according to the type of industry. Here are some examples of binary responses in different industries:

  • Marketing: Did the customer respond to a specific offer or not?
  • Health care: Was a specific drug effective in treating a condition or was it not?
  • Financial: Did a specific trading strategy lead to a profit or not?
  • Web tracking: Did a customer abandon a shopping cart at the checkout or not?

Virtually every industry will have problems which can be formulated in terms of binary outcomes. In fact, sometimes standard linear regression problems are often recast, so instead of predicting the specific values for the target value, the problem will be reformulated...