Book Image

Statistical Application Development with R and Python - Second Edition

Book Image

Statistical Application Development with R and Python - Second Edition

Overview of this book

Statistical Analysis involves collecting and examining data to describe the nature of data that needs to be analyzed. It helps you explore the relation of data and build models to make better decisions. This book explores statistical concepts along with R and Python, which are well integrated from the word go. Almost every concept has an R code going with it which exemplifies the strength of R and applications. The R code and programs have been further strengthened with equivalent Python programs. Thus, you will first understand the data characteristics, descriptive statistics and the exploratory attitude, which will give you firm footing of data analysis. Statistical inference will complete the technical footing of statistical methods. Regression, linear, logistic modeling, and CART, builds the essential toolkit. This will help you complete complex problems in the real world. You will begin with a brief understanding of the nature of data and end with modern and advanced statistical models like CART. Every step is taken with DATA and R code, and further enhanced by Python. The data analysis journey begins with exploratory analysis, which is more than simple, descriptive, data summaries. You will then apply linear regression modeling, and end with logistic regression, CART, and spatial statistics. By the end of this book you will be able to apply your statistical learning in major domains at work or in your projects.
Table of Contents (19 chapters)
Statistical Application Development with R and Python - Second Edition
Credits
About the Author
Acknowledgment
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Index

Summary


We started with a simple linear regression model for the binary classification problem and saw t how limited it was. The probit regression model, which is an adaption of the linear regression model through a latent variable, overcomes the drawbacks of the straightforward linear regression model.

The versatile logistic regression model has been considered in detail and we considered the various kinds of residuals that help in the model validation. The influential and leverage point detection has been discussed too, which helps us build a better model by removing the outliers. A metric in the form of ROC helps us in understanding the performance of a classifier. Finally, we concluded the chapter with an application to the important problem of identifying good customers from the bad ones.

Despite the advantages of linearity, we still have many drawbacks with either the linear regression model or the logistic regression model. The next chapter begins with the family of polynomial regression...