Book Image

Web Application Development with R Using Shiny Second Edition - Second Edition

By : Chris Beeley
Book Image

Web Application Development with R Using Shiny Second Edition - Second Edition

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 (14 chapters)
Web Application Development with R Using Shiny Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Custom HTML links in Shiny


This application makes use of data downloaded from a website I use a lot in my daily work, Patient Opinion (patientopinion.org.uk/). Patient Opinion lets users of health services tell their stories, and my organization makes extensive use of it to gather feedback about our services and improve them. This application uses data downloaded from the site and allows users to see the rate at which stories are posted that relate to different parts of the organization. A custom HTML button will take them straight from the application and onto the search page on Patient Opinion for that service area.

ui.R

Let's take a look at the ui.R file first:

#################################
### custom HTML output - ui.R ###
#################################

library(shiny)
shinyUI(fluidPage(
  tags$head(HTML("<link href='http://fonts.googleapis.com/css?family=Jura' rel='stylesheet' type='text/css'>")),

  h2("Custom HTML", style = "font-family: 'Jura'; color: green; font-size:...