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Learning Shiny

Learning Shiny

By : Hernan Resnizky
2.9 (7)
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Learning Shiny

Learning Shiny

2.9 (7)
By: Hernan Resnizky

Overview of this book

Make the most of R’s dynamic capabilities and implement web applications with Shiny About This Book Present interactive data visualizations in R within the Shiny framework Construct web dashboards in a simple, intuitive, but fully flexible environment Apply your skills to create a real-world web application with this step-by-step guide Who This Book Is For If you are a data scientist who needs a platform to show your results to a broader audience in an attractive and visual way, or a web developer with no prior experience in R or Shiny, this is the book for you. What You Will Learn Comprehend many useful functions, such as lapply and apply, to process data in R Write and structure different files to create a basic dashboard Develop graphics in R using popular graphical libraries such as ggplot2 and GoogleVis Mount a dashboard on a Linux Server Integrate Shiny with non-R-native visualization, such as D3.js Design and build a web application In Detail R is nowadays one of the most used tools in data science. However, along with Shiny, it is also gaining territory in the web application world, due to its simplicity and flexibility. Shiny is a framework that enables the creation of interactive visualizations written entirely in R and can be displayed in almost any ordinary web browser. It is a package from RStudio, which is an IDE for R. From the fundamentals of R to the administration of multi-concurrent, fully customized web applications, this book explains how to achieve your desired web application in an easy and gradual way. You will start by learning about the fundamentals of R, and will move on to looking at simple and practical examples. These examples will enable you to grasp many useful tools that will assist you in solving the usual problems that can be faced when developing data visualizations. You will then walk through the integration of Shiny with R in general and view the different visualization possibilities out there. Finally, you will put your skills to the test and create your first web application! Style and approach This is a comprehensive, step-by-step guide that will allow you to learn and make full use of R and Shiny’s capabilities in a gradual way, together with clear, applied examples.
Table of Contents (13 chapters)
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1
1. Introducing R, RStudio, and Shiny
12
Index

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "If it is a .rda or .RData file, it will open in both."

A block of code is set as follows:

#Load XML library
library(XML)

#URL Public API Worldbank Data Catalog in XML format
url <- "http://api.worldbank.org/v2/datacatalog?format=xml"

#Load XML document
xml.obj <- xmlTreeParse(url)

Any command-line input or output is written as follows:

> class(xml.obj)
[1] "XMLDocument"     "XMLAbstractDocument"

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "In RStudio, whenever a function is declared, it will appear in the Environment section under the Functions section:"

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

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