Book Image

Modern R Programming Cookbook

By : Jaynal Abedin
Book Image

Modern R Programming Cookbook

By: Jaynal Abedin

Overview of this book

R is a powerful tool for statistics, graphics, and statistical programming. It is used by tens of thousands of people daily to perform serious statistical analyses. It is a free, open source system whose implementation is the collective accomplishment of many intelligent, hard-working people. There are more than 2,000 available add-ons, and R is a serious rival to all commercial statistical packages. The objective of this book is to show how to work with different programming aspects of R. The emerging R developers and data science could have very good programming knowledge but might have limited understanding about R syntax and semantics. Our book will be a platform develop practical solution out of real world problem in scalable fashion and with very good understanding. You will work with various versions of R libraries that are essential for scalable data science solutions. You will learn to work with Input / Output issues when working with relatively larger dataset. At the end of this book readers will also learn how to work with databases from within R and also what and how meta programming helps in developing applications.
Table of Contents (10 chapters)

Using the filter verb for data processing

The subset of a dataset can be created in the following two ways with two different perspectives:

  • Subset of rows only
  • Subset of columns only

To select subset of rows only, the filter() verb has been used, and this is faster than its base R counterpart. In this recipe, you will subset a data frame by selecting rows based on certain conditions. Again, this operation can be done on the fly without the need to create a new data frame.

Getting ready

The objective is to create a subset of data frame by taking only those flights that have more than 30 minutes delay. In other words, the subset will contain all the variables from the original dataset, but fewer rows that satisfy the condition...