在 R shiny 中，如何渲染反应对象的绘图？

Question

我在 Shiny 中渲染了很多情节，但这个让我很困惑。当运行以下 MWE 代码时，默认数据 table 会在“负债模块”选项卡下的主面板中正确呈现。此数据 table 是首次打开此选项卡时的默认视图。请参阅下面的第一张图片，看看它是什么样子。

但是，当我在同一个“负债模块”主面板中单击“矢量图”操作按钮时，我得到 错误：需要有限 'ylim' 值如下图2所示。

用于呈现数据的反应对象 table（按预期工作）和绘图（不工作）是相同的 - vectorsAll。

如何绘制 vectorsAll 对象？因此，当用户单击“矢量图”操作按钮而不先单击侧边栏面板中的“输入负债”操作按钮时，现在会绘制来自默认 table 的相同数据（60 的值为 0.2期间）？此外，当用户单击“输入负债”操作按钮并更改矩阵输入网格 A 行中的值时，数据 table 和绘图都应相应更新（正确更新数据 table 基于用户将行 A 输入矩阵从 0.2 更改为 0.23，如下面的第三张图片所示）。

我想将它保留在原生 Shiny 中，而不是 ggplot 或其他绘图包。随着它的进步，我会让这个应用程序变得更有趣。

MWE 代码：

library(shiny)
library(shinyMatrix)
library(shinyjs)

button2 <- function(x,y){actionButton(x,y,style="width:90px;margin-bottom:5px;font-size:80%")}

matrix1Input <- function(x){
  matrixInput(x, 
              value = matrix(c(0.2), 4, 1,dimnames=list(c("A","B","C","D"),NULL)),
              rows = list(extend=FALSE,names=TRUE),
              cols = list(extend=FALSE,names=FALSE,editableNames=FALSE),
              class = "numeric")}

pct <- function(x){paste(format(round(x*100,digits=1),nsmall=1),"%",sep="")} # convert to percentage

vectorBase <- function(x,y){
  a <- rep(y,x)
  b <- seq(1:x)
  c <- data.frame(x = b, y = a)
  return(c)}

ui <- 
  pageWithSidebar(
    headerPanel("Model..."),
    sidebarPanel(
      fluidRow(helpText(h5(strong("Base Input Panel")),align="center",
                        style="margin-top:-15px;margin-bottom:5px")),
      # Panels rendered with uiOuput & renderUI in server to stop flashing at invocation
      uiOutput("Panels") 
    ), # close sidebar panel
    mainPanel(
      tabsetPanel(
        tabPanel("By balances", value=2),
        tabPanel("By accounts", value=3), 
        tabPanel("Liabilities module", value=4,
                 fluidRow(h5(strong(helpText("Select model output to view:")))),
                 fluidRow(
                   button2('showVectorValueBtn','Vector values'),
                   button2('showVectorPlotBtn','Vector plots'),
                 ), # close fluid row
                 
                 div(style = "margin-top: 5px"),
                 
                 # Shows outputs on each page of main panel   
                 uiOutput('showResults')), 
        id = "tabselected"
      ) # close tabset panel
    ) # close main panel
  ) # close page with sidebar

server <- function(input,output,session)({
  
  base_input  <- reactive(input$base_input)
  showResults <- reactiveValues()
  
  yield   <- function(){vectorBase(60,input$base_input[1,1])} # Must remain in server section
  
  # --- Conditional panels rendered here rather than in UI to eliminate invocation flashing ------------>
  output$Panels <- renderUI({
    tagList( 
      conditionalPanel(
        condition="input.tabselected==4",
        actionButton('showLiabilityGrid','Input Liabilities',style='width:100%;background-color:LightGrey'),
        setShadow(id='showLiabilityGrid'),
        div(style = "margin-bottom: 10px"),
      ), # close conditional panel
      conditionalPanel(condition="input.tabselected==3"),
      conditionalPanel(condition="input.tabselected==4")
    ) # close tagList
  }) # close renderUI
  
  # --- Below defines the vectorsAll object before user clicks on actionButton "Input Liabilities" ---->
  vectorsAll <- reactive({
    if (is.null(input$showLiabilityGrid)){df <- NULL}
    else {
      if(input$showLiabilityGrid < 1){df <- cbind(Period = 1:60,Yld_Rate = pct(0.2))}  # define what you want to display by default
      else {
        req(input$base_input)
        df <- cbind(Period = 1:60,Yld_Rate = pct(yield()[,2]))
      } # close 2nd else
    } # close 1st else
    df
  }) # close reactive
  
  output$table1 <- renderTable({vectorsAll()})
  
  # --- Below produces vector values after clicking "Vector Values" button; see above for pre-click ---->
  observeEvent(input$showVectorValueBtn,
               {showResults$showme <-
                 tagList(tableOutput("table1"))
               },ignoreNULL = FALSE)
  
  # --- Below produces vector plots -------------------------------------------------------------------->   
  output$graph1 <-renderPlot(plot(vectorsAll()))
  observeEvent(input$showVectorPlotBtn,{showResults$showme <- plotOutput("graph1")})
  
  # --- Below sends both vector plots and vector values to UI section above ---------------------------->
  output$showResults <- renderUI({showResults$showme})
  
  # --- Below for modal dialog inputs ------------------------------------------------------------------>
  observeEvent(input$showLiabilityGrid,
               {showModal(modalDialog(
                 matrix1Input("base_input"),
                 div(style = "margin-top: 0px"),
                 useShinyjs(),
               ) # close modalDialog
               ) # close showModal
               } # close showModal function
  ) # close observeEvent
  
}) # close server

shinyApp(ui, server)

Answer 1

你的variable/columnYld_Rate是含有%的字符。一旦将其替换为缺失值，它就可以正常工作。试试这个

output$graph1 <-renderPlot(plot(sapply(vectorsAll(), function(x)gsub("%", "", x))))

在 R shiny 中，如何渲染反应对象的绘图？

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