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Applied Supervised Learning with R

You're reading from  Applied Supervised Learning with R

Product type Book
Published in May 2019
Publisher
ISBN-13 9781838556334
Pages 502 pages
Edition 1st Edition
Languages
Authors (2):
Karthik Ramasubramanian Karthik Ramasubramanian
Profile icon Karthik Ramasubramanian
Jojo Moolayil Jojo Moolayil
Profile icon Jojo Moolayil
View More author details
Toc

Table of Contents (12) Chapters close

Applied Supervised Learning with R
Preface
1. R for Advanced Analytics 2. Exploratory Analysis of Data 3. Introduction to Supervised Learning 4. Regression 5. Classification 6. Feature Selection and Dimensionality Reduction 7. Model Improvements 8. Model Deployment 9. Capstone Project - Based on Research Papers Appendix

Logistic Regression


Logistic regression is the most favorable white-box model used for binary classification. White-box models are defined as models where we have visibility of the entire reasoning used for the prediction. For each prediction made, we can leverage the model's mathematical equation and decode the reasons for the prediction made. There are also a set of classification models that are completely black-box, that is, by no means can we understand the reasoning for the prediction leveraged by the model. In situations where we want to focus on only the end outcome, we should prefer black-box models, as they are more powerful.

Though the name ends with regression, logistic regression is a technique used to predict binary categorical outcomes. We would need a different approach to model for a categorical outcome. This can be done by transforming the outcome into a log of odds ratio or the probability of the event happening.

Let's distill this approach into simpler constructs. Assume...

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