Question

我有这个声明，让我得到关于我的变量的基本描述性统计数据：

checkboxGroupInput('show_vars', 'Columns in diamonds to show:',
                          names(input_data), selected = names(input_data))

然而，在不得不取消10个变量以获得我感兴趣的一个变量之后，我意识到这个用户界面不是很友好。我想添加一个按钮，在您单击它时选择/取消选择所有按钮。它可以多次点击。我甚至不确定如何开始。任何推动都会有所帮助。

ui.R：

library(shiny)
hw<-diamonds 

shinyUI(fluidPage(
  title = 'Examples of DataTables',
  sidebarLayout(
    sidebarPanel(
        checkboxGroupInput('show_vars', 'Columns in diamonds to show:',
                           names(hw), selected = names(hw))

    ),
    mainPanel(
      verbatimTextOutput("summary"), 
      tabsetPanel(
        id = 'dataset',
        tabPanel('hw', dataTableOutput('mytable1'))
        )
    )
  )
))

server.R：

library(shiny)
data(diamonds)
hw<-diamonds  
shinyServer(function(input, output) {
  output$summary <- renderPrint({
    dataset <- hw[, input$show_vars, drop = FALSE]
    summary(dataset)
  })
  # a large table, reative to input$show_vars
  output$mytable1 <- renderDataTable({
    library(ggplot2)
    hw[, input$show_vars, drop = FALSE]
  })
})

Answer 1

我添加了global.R来加载包和数据 - 并不总是必要的，但它通常更干净。可能有不同的方法来完成我在下面所做的事情，但我倾向于在这种情况下使用条件面板。

ui.R

library(shiny)

shinyUI(fluidPage(
  title = 'Examples of DataTables',
  sidebarLayout(
    sidebarPanel(

      radioButtons(
        inputId="radio",
        label="Variable Selection Type:",
        choices=list(
          "All",
          "Manual Select"
        ),
        selected="All"),

      conditionalPanel(
        condition = "input.radio != 'All'",
        checkboxGroupInput(
          'show_vars', 
          'Columns in diamonds to show:',
          choices=names(hw), 
          selected = "carat"
        )
      )

    ),
    mainPanel(
      verbatimTextOutput("summary"), 
      tabsetPanel(
        id = 'dataset',
        tabPanel('hw', dataTableOutput('mytable1'))
      )
    )
  )
))

server.R

library(shiny)
library(ggplot2)
##
shinyServer(function(input, output) {

  Data <- reactive({

    if(input$radio == "All"){
      hw
    } else {
      hw[,input$show_vars,drop=FALSE]
    }

  })

  output$summary <- renderPrint({
    ## dataset <- hw[, input$show_vars, drop = FALSE]
    dataset <- Data()
    summary(dataset)
  })

  # a large table, reative to input$show_vars
  output$mytable1 <- renderDataTable({
    Data()
    ## hw[, input$show_vars, drop = FALSE]
  })
})

global.R

library(shiny)
library(ggplot2)
data(diamonds)
hw <- diamonds

enter image description here

Answer 2

这是我设置选择/取消选择所有按钮的方式。

在ui.R中，根据需要添加一个动作按钮：

actionButton("selectall", label="Select/Deselect all")

然后server.R根据操作按钮的条件使用updateCheckboxGroupInput。如果按下按钮的次数是偶数，它将选择全部，否则如果它是奇数，它将选择无。

# select/deselect all using action button

observe({
  if (input$selectall > 0) {
    if (input$selectall %% 2 == 0){
      updateCheckboxGroupInput(session=session, 
                               inputId="show_vars",
                               choices = list("carat" = "carat",
                                              "cut" = "cut",
                                              "color" = "color",
                                              "clarity"= "clarity",
                                              "depth" = "depth",
                                              "table" = "table",
                                              "price" = "price",
                                              "x" = "x",
                                              "y" = "y",
                                              "z" = "z"),
                               selected = c(names(hw)))

    } else {
      updateCheckboxGroupInput(session=session, 
                               inputId="show_vars",
                               choices = list("carat" = "carat",
                                              "cut" = "cut",
                                              "color" = "color",
                                              "clarity"= "clarity",
                                              "depth" = "depth",
                                              "table" = "table",
                                              "price" = "price",
                                              "x" = "x",
                                              "y" = "y",
                                              "z" = "z"),
                               selected = c())

    }}
})

以下示例的完整应用程序 - 您需要将会话添加到服务器功能，我在没有选择变量时添加了renderDataTable的条件。

library(shiny)
library(ggplot2)
data(diamonds)
hw <- diamonds

runApp(
  list(
    ui=(
      fluidPage(
        title = 'Examples of DataTables',
        sidebarLayout(
          sidebarPanel(
            actionButton("selectall", label="Select/Deselect all"),
            checkboxGroupInput('show_vars', 'Columns in diamonds to show:',
                               names(hw), selected = names(hw))

          ),
          mainPanel(
            verbatimTextOutput("summary"),
            tabsetPanel(
              id = 'dataset',
              tabPanel('hw', dataTableOutput('mytable1'))
            ))))),

    server = (function(input, output, session) {
      output$summary <- renderPrint({
        dataset <- hw[, input$show_vars, drop = FALSE]
        summary(dataset)
      })
      observe({
        if (input$selectall > 0) {
          if (input$selectall %% 2 == 0){
            updateCheckboxGroupInput(session=session, inputId="show_vars",
                                     choices = list("carat" = "carat",
                                                    "cut" = "cut",
                                                    "color" = "color",
                                                    "clarity"= "clarity",
                                                    "depth" = "depth",
                                                    "table" = "table",
                                                    "price" = "price",
                                                    "x" = "x",
                                                    "y" = "y",
                                                    "z" = "z"),
                                     selected = c(names(hw)))

          }
          else {
            updateCheckboxGroupInput(session=session, inputId="show_vars",
                                     choices = list("carat" = "carat",
                                                    "cut" = "cut",
                                                    "color" = "color",
                                                    "clarity"= "clarity",
                                                    "depth" = "depth",
                                                    "table" = "table",
                                                    "price" = "price",
                                                    "x" = "x",
                                                    "y" = "y",
                                                    "z" = "z"),
                                     selected = c())

          }}
      })

      # a large table, reative to input$show_vars
     output$mytable1 <- renderDataTable({
        if (is.null(input$show_vars)){
          data.frame("no variables selected" = c("no variables selected"))
        } else{
          hw[, input$show_vars, drop = FALSE]
        }

      })
    })

  ))

Answer 3

shinyWidgets库有一个很好的函数叫pickerInput()，附带一个“全选/取消全选”功能。经过大量研究，我发现这是唯一内置此功能的Shiny输入：

链接到网站：https://dreamrs.github.io/shinyWidgets/index.html

选择/取消选择所有按钮以选择闪亮变量

3 个答案:

ui.R

server.R

global.R