Change the value of a radio input on the client

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


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 A named vector or named list of options. For each item, the name will be used as the label, and the value will be used as the value.
selected A vector or list of options (values) which will be selected.

Change the value of a radio input on the client


Change the value of a radio input on the client


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.


## <strong>Not run</strong>: # 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) # ) # }) # }) # ## <strong>End(Not run)</strong>

See also