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Web Application Development with R Using Shiny

You're reading from   Web Application Development with R Using Shiny Build stunning graphics and interactive data visualizations to deliver cutting-edge analytics

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Product type Paperback
Published in Sep 2018
Publisher
ISBN-13 9781788993128
Length 238 pages
Edition 3rd Edition
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Authors (2):
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Chris Beeley Chris Beeley
Author Profile Icon Chris Beeley
Chris Beeley
Shitalkumar R. Sukhdeve Shitalkumar R. Sukhdeve
Author Profile Icon Shitalkumar R. Sukhdeve
Shitalkumar R. Sukhdeve
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Table of Contents (11) Chapters Close

Preface 1. Beginning R and Shiny FREE CHAPTER 2. Shiny First Steps 3. Integrating Shiny with HTML 4. Mastering Shiny's UI Functions 5. Easy JavaScript and Custom JavaScript Functions 6. Dashboards 7. Power Shiny 8. Code Patterns in Shiny Applications 9. Persistent Storage and Sharing Shiny Applications 10. Other Books You May Enjoy

Functions and modules

We have now gone through a good number of Shiny applications that are focused on different topics. Imagine that we now have to develop a fully-fledged enterprise application with various functionalities as a Shiny application. As the application grows, so will the number of lines of code and its complexity. In situations such as these, applications can become unmanageable. We may also be rewriting the same kind of code repeatedly, thereby increasing the development time. Additionally, variables need to be scoped, which limits the reusability of names. To eliminate these obstacles, we can use modularization.

Modularization is nothing but the use of separating modules according to their functionality. Modules can be defined as a set of instructions that are written to accomplish a task. R programming is developed around modules. We repeatedly call functions...

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