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:  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

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  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  Sidebar  Grid: Fluid Grid, Fixed Grid  Tabsets  Navlists  Nabbar Pages  Themes

Demonstration   