R Shiny eventReactive actionBotton interaction -

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i have actionbotton randomly pick 1 column first 5 columns dataset mtcars , plot it.

now actionbotton job chart not plotted @ first place when app launched.

is there way have plotted when shiny app launched.

library(shiny)  server <- function(input, output) {   x = eventreactive(input$plot,{     mtcars   })   output$plot = renderplot({     = sample(1:5,1)     plot(x()[,i],ylab=names(mtcars)[i])   }) }  ui <- fluidpage(   actionbutton("plot","randomly plot"),   plotoutput("plot")  )  shinyapp(ui = ui, server = server)

you can add condition button hasn't been clicked. note button works counter if hasn't been clicked value 0.

library(shiny)  server <- function(input, output) {   x = eventreactive(input$plot,{     mtcars   })   output$plot = renderplot({     = sample(1:5,1)     if(input$plot == 0){       return(plot(mtcars[,i],ylab=names(mtcars)[i]))     }     plot(x()[,i],ylab=names(mtcars)[i])   }) }  ui <- fluidpage(   actionbutton("plot","randomly plot"),   plotoutput("plot")  )  shinyapp(ui = ui, server = server)

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