updateRadioButtons.Rd

% Generated by roxygen2 (4.0.1): do not edit by hand
\name{updateRadioButtons}
\alias{updateRadioButtons}
\title{Change the value of a radio input on the client}
\usage{
updateRadioButtons(session, inputId, label = NULL, choices = NULL,
  selected = NULL, inline = FALSE)
}
\arguments{
\item{session}{The \code{session} object passed to function given to
\code{shinyServer}.}

\item{inputId}{The id of the input object.}

\item{label}{The label to set for the input object.}

\item{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)}

\item{selected}{The initially selected value (if not specified then
defaults to the first value)}

\item{inline}{If \code{TRUE}, render the choices inline (i.e. horizontally)}
}
\description{
Change the value of a radio input on the client
}
\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, \code{\link{numericInput}()} and
\code{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{
\dontrun{
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)
    )
  })
})
}
}
\seealso{
\code{\link{radioButtons}}
}