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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 2. Shiny First Steps FREE CHAPTER 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

Custom interfaces from GET strings

In this example, we're going to produce URLs that allow Shiny to configure itself when the user lands on the page to save them from having to set up their preferences each time. We will make use of two variables: one specifies that a user is only interested in data from the NHS network domain and the other specifies that the user wants a smoothing line present on their trend graph. Users who request a smoothing line will also be taken straight to the trendline tab.

As well as the work with the GET query, the only extra bit we will need here is a function to change the selected panel from tabsetPanel(). This is done, unsurprisingly, using updateTabsetPanel().

Catering to these different needs is very easily done by creating URLs that encode the preferences and giving them to the different users. To simplify the code, we will pretend that...

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