Book Image

Hands-On Data Science with R

By : Vitor Bianchi Lanzetta, Doug Ortiz, Nataraj Dasgupta, Ricardo Anjoleto Farias
Book Image

Hands-On Data Science with R

By: Vitor Bianchi Lanzetta, Doug Ortiz, Nataraj Dasgupta, Ricardo Anjoleto Farias

Overview of this book

R is the most widely used programming language, and when used in association with data science, this powerful combination will solve the complexities involved with unstructured datasets in the real world. This book covers the entire data science ecosystem for aspiring data scientists, right from zero to a level where you are confident enough to get hands-on with real-world data science problems. The book starts with an introduction to data science and introduces readers to popular R libraries for executing data science routine tasks. This book covers all the important processes in data science such as data gathering, cleaning data, and then uncovering patterns from it. You will explore algorithms such as machine learning algorithms, predictive analytical models, and finally deep learning algorithms. You will learn to run the most powerful visualization packages available in R so as to ensure that you can easily derive insights from your data. Towards the end, you will also learn how to integrate R with Spark and Hadoop and perform large-scale data analytics without much complexity.
Table of Contents (16 chapters)

Miscellaneous topics

In this section, we will look at a few other data-related topics. The following will be covered:

  • Checking data quality
  • Reading binary files: Excel, SAS, and other data sources
  • On-disk formats
  • Working with web data

Checking data quality

There are several inbuilt functions as well as packages for checking the quality of data in R. The most commonly used among them is the summary function in base R:

## Packages Used: 
## psych, pastecs, dataMaid, daff 
# install.packages(c("psych","pastecs","dataMaid","daff")) 
state <- data.frame(state.x77) 
state$State <- row.names(state) 

The output of the preceding code is as follows: