shiny-exapmle

server.R

library(shiny)

shinyServer(function(input, output) {
   
  output$distPlot <- renderPlot({
    
    x <- iris[, input$numericInputData] 
    bins <- seq(min(x), max(x), length.out = input$sliderInputData + 1)
    
    hist(x, breaks = bins, col = 'darkgray', border = 'white')
    
  })
})

ui.R

library(shiny)

shinyUI(fluidPage(
  
  titlePanel("numericInput"),
  
  sidebarLayout(
    sidebarPanel(
      numericInput("numericInputData",
                   "irisデータでヒストグラムを表示する列番号",
                   min = 1,
                   max = 4,
                   value = 1),
    sliderInput("sliderInputData",
                 "Number of bins:",
                 min = 1,
                 max = 50,
                 value = 30)
    ),
    
    mainPanel(
       plotOutput("distPlot")
    )
  )
))