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Creates an action button or link whose value is initially zero, and increments by one each time it is pressed.
actionButton(inputId, label, icon = NULL, width = NULL, ...)actionLink(inputId, label, icon = NULL, ...)
The input slot that will be used to access the value.
The contents of the button or link--usually a text label, but you could also use any other HTML, like an image.
An optional icon to appear on the button.
The width of the input, e.g. '400px', or '100%';
see validateCssUnit.
Named attributes to be applied to the button or link.
observeEvent and eventReactive
Other input elements: checkboxGroupInput,
checkboxInput, dateInput,
dateRangeInput, fileInput,
numericInput, passwordInput,
radioButtons, selectInput,
sliderInput, submitButton,
textAreaInput, textInput
# NOT RUN {
## Only run examples in interactive R sessions
if (interactive()) {
ui <- fluidPage(
sliderInput("obs", "Number of observations", 0, 1000, 500),
actionButton("goButton", "Go!"),
plotOutput("distPlot")
)
server <- function(input, output) {
output$distPlot <- renderPlot({
# Take a dependency on input$goButton. This will run once initially,
# because the value changes from NULL to 0.
input$goButton
# Use isolate() to avoid dependency on input$obs
dist <- isolate(rnorm(input$obs))
hist(dist)
})
}
shinyApp(ui, server)
}
# }
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