R shiny: read a table from file and use it

Question

I want to read a data.frame from file and then use it for making plots later on. The problem is that when I read the data, it is part of an output Object and can not be used

Answer 1

Make use of the reactive function :

Make the following changes in the server part of your App

library(shiny)

shinyServer(function(input, output) {

mydata <- reactive({

inFile <- input$file1

if (is.null(inFile))
  return(NULL)

tbl <- read.csv(inFile$datapath, header=input$header, sep=input$sep,  dec = input$dec)

return(tbl)
})

 output$table.output <- renderTable({
 mydata()
 })

 output$plot1 <- renderPlot({
  x <- mydata()[,1]
  plot(x)
 })
})