radioButtons
radioButtons(inputId, label, choices, selected = NULL, inline = FALSE,
width = NULL)
Arguments
inputId | The input slot that will be used to access the value. |
---|---|
label | Display label for the control, or NULL for no label. |
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) |
width | The width of the input, e.g. '400px' , or '100%' ;
see validateCssUnit . |
Value
-
A set of radio buttons that can be added to a UI definition.
Description
Create a set of radio buttons used to select an item from a list.
Details
If you need to represent a "None selected" state, it's possible to default
the radio buttons to have no options selected by using
selected = character(0)
. However, this is not recommended, as it gives
the user no way to return to that state once they've made a selection.
Instead, consider having the first of your choices be c("None selected"
= "")
.
Examples
## Only run examples in interactive R sessions
if (interactive()) {
ui <- fluidPage(
radioButtons("dist", "Distribution type:",
c("Normal" = "norm",
"Uniform" = "unif",
"Log-normal" = "lnorm",
"Exponential" = "exp")),
plotOutput("distPlot")
)
server <- function(input, output) {
output$distPlot <- renderPlot({
dist <- switch(input$dist,
norm = rnorm,
unif = runif,
lnorm = rlnorm,
exp = rexp,
rnorm)
hist(dist(500))
})
}
shinyApp(ui, server)
}
See also
Other input.elements: actionButton
,
checkboxGroupInput
,
checkboxInput
, dateInput
,
dateRangeInput
, fileInput
,
numericInput
, passwordInput
,
selectInput
, sliderInput
,
submitButton
, textAreaInput
,
textInput