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

Packages and settings – R and Python


As the chapter reviews some of the techniques in the latter half of the book, we need a lot of packages and functions:

  1. First set the working directory:

    setwd("MyPath/R/Chapter_10")
  2. Load the required R package:

    library(RSADBE)
    library(rpart)
    library(rattle)
    library(MASS)
    library(ROCR)
  3. A host of functions from numpy, pandas, matplotlib, and sklearn will be required for Python analyses:

Understanding recursive partitions

The name of the library package rpart, shipped along with R, stands for Recursive Partitioning. The package was first created by Terry M Therneau and Beth Atkinson, and is currently maintained by Brian Ripley. We will first have a look at what recursive partitions means.

A complex and contrived relationship is generally not identifiable by linear models. In the previous chapter, we saw the extensions of the linear models in piecewise, polynomial, and spline regression models.

It is also well known that if the order of a model is larger than 4, then...