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

Web Application Development with R Using Shiny Second Edition

Table of Contents

Web Application Development with R Using Shiny Second Edition

Credits

About the Author

About the Reviewer

www.PacktPub.com

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Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Getting Started with R and Shiny!

Installing R

The R console

Code editors and IDEs

Learning R

Getting help

Loading data

Data types and structures

Dataframes, lists, arrays, and matrices

Variable types

Functions

Objects

Base graphics and ggplot2

Bar chart

Line chart

Advanced tasks with dplyr and ggvis

Preparing the data

A simple interactive line plot

Installing Shiny and running the examples

Summary

2. Building Your First Application

Types of Shiny application

Interactive Shiny documents in RMarkdown

A minimal example of a fully Shiny application

ui.R of minimal example

A note on HTML helper functions

The finished interface

server.R of minimal example

The program structure

An optional exercise

Embedding applications in documents

Widget types

The Google Analytics application

The UI

Data processing

Reactive objects

Outputs

Text summary

Trend graphs

A map of users across the world

A note on the application code

An optional exercise

Advanced layout features

Summary

3. Building Your Own Web Pages with Shiny

Running the applications and code

Shiny and HTML

Custom HTML links in Shiny

ui.R

server.R

server.R – data preparation

server.R – the server definition

A minimal HTML interface

index.html

server.R

JavaScript and Shiny

Example 1 – reading and writing the DOM

ui.R

server.R

Example 2 – sending messages between client and server

ui.R

server.R

dropdownDepend.js

Take a step back and rewind

jQuery

index.html – the body

server.R

Exercise

Debugging

Bootstrap 3 and Shiny

Summary

4. Taking Control of Reactivity, Inputs, and Outputs

What's new in our application?

Downloading data from RGoogleAnalytics

Animation

Streamline the UI by hiding elements

Naming tabPanel elements

Beautiful tables with DataTable

Reactive user interfaces

The reactive user interface example – server.R

The reactive user interface example – ui.R

Progress bars

Advanced reactivity and data handling

Controlling the whole interface with submitButton()

Controlling specific inputs with the isolate() function

Running reactive functions over time

Using reactive objects and functions efficiently

More advanced topics in Shiny

Finely controlling inputs and outputs

Reading client information and GET requests in Shiny

Custom interfaces from GET strings

Advanced graphics options

Downloading graphics and reports

Downloadable reports with knitr

Downloading and uploading data

Debugging

Good practice when coding Shiny applications

Debugging functions

Summary

5. Advanced Applications I – Dashboards

Applications in this chapter

Version one – sidebar layout

Adding icons to your UI

Using shinyBS to add pop-ups and tooltips

ui.R

Adding a pop-up window to an output

Using shinythemes

Version two – grid layout (A)

ui.R

Version two – grid layout (B)

ui.R

Version three – navigation bar

ui.R

Version four – dashboard

Notifications

Info boxes

ui.R

Google Charts gauge

Resizing the google chart

ui.R

Summary

6. Advanced Applications II – Using JavaScript Libraries in Shiny Applications

The htmlwidgets package

The application framework

ui.R

Dygraphs

server.R

Dygraphs with a prediction

rCharts

d3heatmap

threejs

Summary

7. Sharing Your Creations

Sharing with the R community

Sharing over GitHub

An introduction to Git

Using Git and GitHub within Rstudio

Projects in RStudio

Sharing applications using Git

Sharing using .zip and .tar

Sharing with the world

Shinyapps.io

Shinyapps.io without RStudio

Shiny Server

Scoping, loading, and reusing data in Shiny applications

Temporary data input/output

Permanent data functions

Browser compatibility

Summary

Index