Change the value of a radio input on the client
Change the value of a radio input on the client
updateRadioButtons( session = getDefaultReactiveDomain(), inputId, label = NULL, choices = NULL, selected = NULL, inline = FALSE, choiceNames = NULL, choiceValues = NULL )
session |
The |
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). If
this argument is provided, then |
selected |
The initially selected value. If not specified, then it
defaults to the first item in |
inline |
If |
choiceNames |
List of names and values, respectively, that
are displayed to the user in the app and correspond to the each choice (for
this reason, |
choiceValues |
List of names and values, respectively, that
are displayed to the user in the app and correspond to the each choice (for
this reason, |
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). Similarly, for these inputs, the selected item
can be cleared by using selected=character(0).
## Only run examples in interactive R sessions
if (interactive()) {
ui <- fluidPage(
p("The first radio button group controls the second"),
radioButtons("inRadioButtons", "Input radio buttons",
c("Item A", "Item B", "Item C")),
radioButtons("inRadioButtons2", "Input radio buttons 2",
c("Item A", "Item B", "Item C"))
)
server <- function(input, output, session) {
observe({
x <- input$inRadioButtons
# Can also set the label and select items
updateRadioButtons(session, "inRadioButtons2",
label = paste("radioButtons label", x),
choices = x,
selected = x
)
})
}
shinyApp(ui, server)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.