shinyTree未呈现复选框输出

Question

我正在使用shinyTree来呈现数据表。以下是迄今为止使用的代码数据集：

library(shiny)
library(shinyTree)
newdat <- structure(list(RESPID = c("41000123", "41004132", "41006132", 
"41007121", "41007123"), PDT_A = c(125, 66, 45, 28, 
0), PDT_B = c(10, 0, 0, 0, 0), PDT_C = c(0, 0, 0, 0, 0), PDT_D = c(450, 
105, 75, 192, 0), PDT_TOTAL = c(585, 171, 120, 220, 0)), .Names = c("RESPID", 
"PDT_A", "PDT_B", "PDT_C", "PDT_D", "PDT_TOTAL"), row.names = c("6", 
"40", "56", "59", "61"), class = "data.frame")

server <- shinyServer(function(input, output, session) {
    newdata <- reactive({newdat})
  output$tree <- renderTree({
    sss=list('TOTAL_VALUE'= list('TOTAL_VALUE_OF_MERCHANDISE'   =  structure(list('PDT_TOTAL'='1001'), stopened=FALSE),
        'PDT_CAT'   =  structure(list('PDT_TOTAL'='1002','PDT_A'='152','PDT_B'='153','PDT_C'='154','PDT_D'='155'), stopened=FALSE)
        ))
    attr(sss[[1]],"stopened")=FALSE 
    sss
  })
  catdat <- reactive({
      tree <- input$tree
      unlist(get_selected(tree))
  })
  coldat <- reactive({
      newdata()[,catdat()]
  })
  output$datatab <- renderDataTable({
        coldat()
  })

})

ui <- shinyUI(
  pageWithSidebar(
    headerPanel("TEST"),
    sidebarPanel(
      shinyTree("tree", checkbox = TRUE)
    ),
    mainPanel(
      dataTableOutput("datatab")
    )
  ))
shinyApp(ui,server)

生成树。我在通过数据表输出呈现列时遇到以下问题：

1. 树的第一个分支，仅指一列：该列未在亮显中渲染。我收到一条错误消息undefined columns selected。

2. 树的第二个分支应该呈现表的所有五列。但是，它只渲染任意四列。

如果我选择第二个分支的根，则得到相同的undefined columns selected。当我取消选中其中一个分支时，将呈现具有4列的表。

如何渲染所有列？有没有一种方法可以删除分支根/节点级别的复选框？

Answer 1

Ad 1.您会出现此错误，因为如果您选择树的第一个分支，则catdat()会返回一个包含"PDT_TOTAL"和"TOTAL_VALUE_OF_MERCHANDISE"的向量，而数据集中没有"TOTAL_VALUE_OF_MERCHANDISE"这样的变量。

Ad 2.如果您选择了所有五个选项，则catdat()将额外返回"PDT_CAT"，并且您遇到了与上面相同的问题-数据集中没有这样的变量。(同上-如果您选择所有选项，那么"PDT_TOTAL"，它会额外返回"TOTAL_VALUE_OF_MERCHANDISE"(

---

要渲染所有列，您可以执行以下操作：

首先，从数据集中动态选择变量，然后删除重复项，因为当选择第一个选项TOTAL_VALUE时，catdat()会返回两次"TOTAL_VALUE"。

还有另一个问题：如果只选择了一个变量，newdata()[,vars]将返回一个向量，而renderDataTable不会打印任何内容，因为它只适用于数据帧。为了解决这个问题，您可以删除,以确保子设置始终返回一个数据帧-newdata()[vars]

coldat <- reactive({
    vars <- catdat()
    vars <- vars[!(vars %in% c("TOTAL_VALUE", "TOTAL_VALUE_OF_MERCHANDISE", "PDT_CAT"))]
    vars <- unique(vars)
    print(vars)
    # newdata()[,vars] # If you select only one variable then this reactive returns an object of class numeric and not a data.frame
    newdata()[vars] # remove "," and it will always return a data frame
  })

---

完整示例：

library(shiny)
library(shinyTree)
newdat <- structure(list(RESPID = c("41000123", "41004132", "41006132", 
                                    "41007121", "41007123"), PDT_A = c(125, 66, 45, 28, 
                                                                       0), PDT_B = c(10, 0, 0, 0, 0), PDT_C = c(0, 0, 0, 0, 0), PDT_D = c(450, 
                                                                                                                                          105, 75, 192, 0), PDT_TOTAL = c(585, 171, 120, 220, 0)), .Names = c("RESPID", 
                                                                                                                                                                                                              "PDT_A", "PDT_B", "PDT_C", "PDT_D", "PDT_TOTAL"), row.names = c("6", 
                                                                                                                                                                                                                                                                              "40", "56", "59", "61"), class = "data.frame")

server <- shinyServer(function(input, output, session) {
  newdata <- reactive({newdat})
  output$tree <- renderTree({
    sss=list('TOTAL_VALUE'= list('TOTAL_VALUE_OF_MERCHANDISE'   =  structure(list('PDT_TOTAL'='1001'), stopened=FALSE),
                                 'PDT_CAT'   =  structure(list('PDT_TOTAL'='1002','PDT_A'='152','PDT_B'='153','PDT_C'='154','PDT_D'='155'), stopened=FALSE)
    ))
    attr(sss[[1]],"stopened")=FALSE 
    sss
  })
  catdat <- reactive({
    tree <- input$tree
    unlist(get_selected(tree))
  })
  coldat <- reactive({
    vars <- catdat()
    vars <- vars[!(vars %in% c("TOTAL_VALUE", "TOTAL_VALUE_OF_MERCHANDISE", "PDT_CAT"))]
    vars <- unique(vars)
    print(vars)
    # newdata()[,vars] # If you select only one variable then this reactive returns an object of class numeric and not a data.frame
    newdata()[vars] # remove "," and it will always return a data frame
  })
  output$datatab <- renderDataTable({
    coldat()
  })

})

ui <- shinyUI(
  pageWithSidebar(
    headerPanel("TEST"),
    sidebarPanel(
      shinyTree("tree", checkbox = TRUE)
    ),
    mainPanel(
      dataTableOutput("datatab")
    )
  ))
shinyApp(ui,server)