# This is the server logic for a Shiny web application.
# You can find out more about building applications with Shiny here:
#
# http://shiny.rstudio.com
#

library(shiny)

shinyServer(function(input, output) {

  output$distPlot <- renderPlot({

    # generate bins based on input$bins from ui.R
    x    <- faithful[, 2]
    bins <- seq(min(x), max(x), length.out = input$bins + 1)

    # draw the histogram with the specified number of bins
    hist(x, breaks = bins, col = 'darkgray', border = 'white')

  })
  
  # 向用户界面输出iris数据表，根据input$n输出行数
  output$mytable <- renderTable({
    head(iris,input$n)
  })
  
  # 用用户界面输出箱线图，并根据input$outliers是否输出异常点
  output$myplot <- renderPlot({
    boxplot(Sepal.Length~Species,data=iris,
            col=rainbow(3),outline = input$outliers)
  })

})