updateNumericInput {shiny} | R Documentation

## Change the value of a number input on the client

### Description

Change the value of a number input on the client

### Usage

    updateNumericInput(session, inputId, label = NULL, value = NULL,
      min = NULL, max = NULL, step = NULL)

### Arguments

`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.
`value` | The value to set for the input object.
`min` | Minimum value.
`max` | Maximum value.
`step` | Step size.

### 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, `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)`.

### See Also

`numericInput`

### Examples

    ## Only run examples in interactive R sessions
    if (interactive()) {

    ui <- fluidPage(
      sliderInput("controller", "Controller", 0, 20, 10),
      numericInput("inNumber", "Input number", 0),
      numericInput("inNumber2", "Input number 2", 0)
    )

    server <- function(input, output, session) {

      observeEvent(input$controller, {
        # We'll use the input$controller variable multiple times, so save it as x
        # for convenience.
        x <- input$controller

        updateNumericInput(session, "inNumber", value = x)

        updateNumericInput(session, "inNumber2",
          label = paste("Number label ", x),
          value = x, min = x-10, max = x+10, step = 5)
      })
    }

    shinyApp(ui, server)
    }

[Package shiny version 1.0.5 Index]