shiny.md

Interactive apps with shiny

We will need

library("shiny")

The architecture of a shiny app

The overview figure below is based and makes reference to the written tutorial.

Running the apps

## in ui.R
shinyUI(fluidPage(...))

## in server.R
shinyServer(function(input, ouput) {
    ...
})

runApp("app-dir")

Example apps

• shiny-app1

• shiny-app2

Single-file app

ui <- fluidPage(...)
server <- function(input, output) { ... }

app <- list(ui = ui, server = server)
runApp(app)

Sharing

• Share the code file(s) and runApp
• runUrl
• runGitHub
• runGist
• shinyapps
• Shiny server

Exercise

Read and understand the code of the apps above and run them locally. Then, try to update them to replace of add some widgets.

More interactivity

 plotOutput("pca",
            hover = "hover",
            click = "click",
            dblclick = "dblClick",
            brush = brushOpts(
                id = "brush",
                resetOnNew = TRUE))

Example here.

Shiny apps

Push your shiny apps online with shinyapps.

References

• shiny page
• shiny cheat sheet