updateRadioButtons

From shiny v0.12.2 by Winston Chang

Change the value of a radio input on the client

Usage

updateRadioButtons(session, inputId, label = NULL, choices = NULL,
  selected = NULL, inline = FALSE)

Arguments

session: The session object passed to function given to shinyServer.
inputId: The id of the input object.
label: The label to set for the input object.
choices: List of values to select from (if elements of the list are named then that name rather than the value is displayed to the user)
selected: The initially selected value (if not specified then defaults to the first value)
inline: If TRUE, render the choices inline (i.e. horizontally)

Details

The input updater functions send a message to the client, telling it to change the settings of an input object. The messages are collected and sent after all the observers (including outputs) have finished running.

The syntax of these functions is similar to the functions that created the inputs in the first place. For example, numericInput() and updateNumericInput() take a similar set of arguments.

Any arguments with NULL values will be ignored; they will not result in any changes to the input object on the client.

Examples

shinyServer(function(input, output, session) {

  observe({
    # We'll use the input$controller variable multiple times, so save it as x
    # for convenience.
    x <- input$controller

    r_options <- list()
    r_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
    r_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)

    # Change values for input$inRadio
    updateRadioButtons(session, "inRadio", choices = r_options)

    # Can also set the label and select an item
    updateRadioButtons(session, "inRadio2",
      label = paste("Radio label", x),
      choices = r_options,
      selected = sprintf("option-%d-2", x)
    )
  })
})

Documentation reproduced from package shiny, version 0.12.2, License: GPL-3 | file LICENSE

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