11.10 SERVER

• Reactive output automatically responds when users change widget input values

• BUT we need to tell the server what to do with the input values

• server <- function(input, output) {**construction of output objects in here**})

• Describe the server how to build the object

  • The object will be reactive if the code that builds it calls a widget value
  • output$distPlot <- renderPlot({...}) (store in output list)
  • render functions wrap outputs and correspond to the type or reactive output
    • renderImage({...}) creates images (saved as a link to a source file)
    • renderPlot({...}) creates plots
    • renderPrint({...}) creates any printed output
    • renderTable({...}) creates data frame, matrix, other table like structures
    • renderText({...}) creates character strings
    • renderUI({...}) creates a Shiny tag object or HTML