Answer by Shree for in R Shiny, update an object based on user input

If I understand your problem correctly, here's a way using reactiveValues and observeEvent with ignoreInit = TRUE. Below app will start off with initial value 5 in output$test but will later depend on input$slider. This way you are always referencing to a reactive value in the output.

ui <- fluidPage(  sliderInput("slider", "Slider", 1, 10, 10),  verbatimTextOutput("test"))server <- function(input, output, session) {  graph <- reactiveValues(g = 5)# initial value  observeEvent(input$slider, {    graph$g <- input$slider # new value  }, ignoreInit = TRUE)  output$test <- renderPrint({graph$g})}shinyApp(ui, server)