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Web Application Development with R Using Shiny Second Edition

Web Application Development with R Using Shiny Second Edition

By : Chris Beeley
3.5 (10)
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Web Application Development with R Using Shiny Second Edition

Web Application Development with R Using Shiny Second Edition

3.5 (10)
By: Chris Beeley

Overview of this book

R is a highly flexible and powerful tool for analyzing and visualizing data. Most of the applications built using various libraries with R are desktop-based. But what if you want to go on the web? Here comes Shiny to your rescue! Shiny allows you to create interactive web applications using the excellent analytical and graphical capabilities of R. This book will guide you through basic data management and analysis with R through your first Shiny application, and then show you how to integrate Shiny applications with your own web pages. Finally, you will learn how to finely control the inputs and outputs of your application, along with using other packages to build state-of-the-art applications, including dashboards.
Table of Contents (9 chapters)
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8
Index

Using shinyBS to add pop-ups and tooltips


The first thing we're going to look at is using the shinyBS package to add pop-up windows and tooltips. There is more on the functionality of the shinyBS package present at cran.r-project.org/web/packages/shinyBS/shinyBS.pdf. If you haven't installed already, install shinyBS with install.packages("shinyBS").

The server.R file is very similar to the version we encountered in Chapter 2, Building Your First Application, except the map that has been removed (this will be added back in later on in the chapter), and there are a couple of more functions to power the new UI elements.

The first changes are visible at the top of server.R; we are using the shinyBS package:

...[load packages from original application]...
library(shinyBS)

Also, shinyServer() takes a session argument:

shinyServer(function(input, output, session){

We saw the use of the session argument in Chapter 3, Building Your Own Web Pages with Shiny; in this case, it will be used for two purposes...

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