如何在R闪亮中显示动态数量的输出?

时间:2018-04-23 16:29:18

标签: r shiny

我做什么: 我有一个闪亮的应用程序,它返回我的csv的每一列作为逐字输出。我附上了我当前的代码(UI.R和Server.R)和下面的csv-File。

我的问题:我需要为许多不同的csv文件编写这样的应用程序,这些文件都有不同数量的列。如何自动执行此操作而无需编写

output$myColumn01 = renderPrint({
as.character(D$Names)
})

h1("Names"),
verbatimTextOutput("myColumn01"),

手动每列?

-

这是我的csv(“myCSV.csv”):

Names;Pages;Scores;Numbers
George;T;3;5
Jim;I;4;23
Jack;T;6;12
Anna;R;4;3

这是我的服务器.R-File:

library(shiny)
library(dplyr)
library(shinydashboard)



server <- shinyServer(function(input, output, session) {


D = read.csv(file = "myCSV.csv", sep = ";")



output$myColumn01 = renderPrint({
as.character(D$Names)
})


output$myColumn02 = renderPrint({
as.character(D$Pages)
})


output$myColumn03 = renderPrint({
as.character(D$Scores)
})


output$myColumn04 = renderPrint({
as.character(D$Numbers)
})



})

这是我的ui.R-File:

library(shiny)
library(dplyr)
library(shinydashboard)


ui <- shinyUI(dashboardPage(

  dashboardHeader(title =  "Sessions"),
  dashboardSidebar(
    width = 350,
    collapsed = TRUE,
     ""
  ),



  dashboardBody(


  h1("Names"),
  verbatimTextOutput("myColumn01"),
  h1("Pages"),
  verbatimTextOutput("myColumn02"),
  h1("Scores"),
  verbatimTextOutput("myColumn03"),
  h1("Numbers"),
  verbatimTextOutput("myColumn04")

  )
))

1 个答案:

答案 0 :(得分:3)

这是你期望的吗?

library(shiny)
library(dplyr)
library(shinydashboard)

server <- shinyServer(function(input, output, session) {

  D = read.csv(file = "myCSV.csv", sep = ";")

  lapply(1:ncol(D), function(i){
    output[[sprintf("myColumn%02d",i)]] <- 
      renderPrint({
        as.character(D[[colnames(D)[i]]])
      })
  })

  output$ui <- renderUI({
    lapply(1:ncol(D), function(i){
      tagList(
        h1(colnames(D)[i]),
        verbatimTextOutput(sprintf("myColumn%02d",i))
      )
    })
  })

})


ui <- shinyUI(dashboardPage(

  dashboardHeader(title = "Sessions"),
  dashboardSidebar(
    width = 350,
    collapsed = TRUE,
    ""
  ),

  dashboardBody(

    uiOutput("ui")

  )
))

shinyApp(ui=ui, server=server)

enter image description here