# R: Change the value of a checkbox group input on the client

updateCheckboxGroupInput {shiny} | R Documentation

## Change the value of a checkbox group input on the client

### Description

Change the value of a checkbox group input on the client

### Usage

    updateCheckboxGroupInput(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 show checkboxes for. If elements of the list are named then that name rather than the value is displayed to the user.
`selected` | The values that should be initially selected, if any.
`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.

For `radioButtons()`, `checkboxGroupInput()` and `selectInput()`, the set of choices can be cleared by using `choices=character(0)`

### See Also

`checkboxGroupInput`

### Examples

    ## Not run:
    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

        # Create a list of new options, where the name of the items is something
        # like 'option label x 1', and the values are 'option-x-1'.
        cb_options <- list()
        cb_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
        cb_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)

        # Change values for input$inCheckboxGroup
        updateCheckboxGroupInput(session, "inCheckboxGroup", choices = cb_options)

        # Can also set the label and select items
        updateCheckboxGroupInput(session, "inCheckboxGroup2",
          label = paste("checkboxgroup label", x),
          choices = cb_options,
          selected = sprintf("option-%d-2", x)
        )
      })
    })

    ## End(Not run)

[Package shiny version 0.13.2 Index]