Transcript Shining with Shiny: Introducing a Web Application Framework for R

SHINING WITH SHINY:
INTRODUCING A WEB
APPLICATION FRAMEWORK
FOR R
Gokul Bhandari
What is Shiny?
A
web application framework for R developed by Rstudio
 R is open source statistical programming language
 Download R from r-project.org
 Download Rstudio (IDE) from rstudio.com
 R packages: shiny, shinyapps
Deployment of shiny
 Two
ways: Shiny Server and shinyapps
 Shiny server: Open source and Professional versions
 Through shinyapps: https://www.shinyapps.io/
 Free, Basic $39/month, standard $99/month, Professional
$299/month
Example of shiny app
Code: ui.R
Code: server.R
Building user-interface (minimum code)
Building user-interface
Building user-interface
Adding control widgets
Adding control widgets
Displaying reactive output
 Output
dynamically computed every time an input changes
 Inputs are given through widgets
 Code updates the recent values of widgets
Output (ui) & render (server) functions
Reactivity: Main points
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use an *Output function in the ui.R script to place reactive objects in
your Shiny app
use a render* function in the server.R script to tell Shiny how to build
your objects
surround R expressions by braces, { }, in each render* function
save your render* expressions in the output list, with one entry for
each reactive object in your app.
create reactivity by including an input value in a render* expression
Shiny Layouts
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Sidebar
Grid: Fluid Grid, Fixed Grid
Tabsets
Navlists
Nabbar Pages
Themes
Demonstration
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https://gokul.shinyapps.io/AOLAnalyzer/
https://gokul.shinyapps.io/shinyDoc/stat1.Rmd
http://rpubs.com/gokul108