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


In this chapter, we have visualized different types of graphs for different types of variables. We have also explored how to gain insights into data through the graphs. It is important to realize that, without a clear understanding of the data structure, the plots are meaningless if they are generated without exercising enough caution. The GIGO adage is very true and no rich visualization technique helps overcome this problem.

In the previous chapter, we learned the important methods of importing/exporting data, and visualized the data in different forms. Now that we have an understanding and visual insight of the data, we need to take the next step, namely quantitative analysis of the data. There are roughly two streams of analysis: exploratory and confirmative analysis. It is the former analysis technique that forms the center of the next chapter. As an instance, the scatter plot reveals whether there is a positive, negative, or no association between the two variables. If the association...