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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

Feature Engineering


The algorithms we use in machine learning will perform based on the quality and goodness of the data; they do not have any intelligence of their own. The better and innovative you become in designing features, the better the model performance. Feature engineering in many ways helps in bringing the best out of data. The term feature engineering essentially refers to the process of the derivation and transformation of given features, thus better characterizing the meaning of the features and representing the underlying problem of the predictive model. By this process, we anticipate the improvement in the model's predictability power and accuracy.

Discretization

In Chapter 3, Introduction to Supervised Learning, we converted the numeric values of a 3-hour rolling average of PM2.5 in the Beijing dataset to the binary values 1 and 0 for logistic regression, based on the threshold of 35, where 1 means normal and 0 means above normal. The process is called discretization, also...

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