Question

我正在开发一个闪亮的应用程序，其中用户的一些输入（保存在数据框中）用于在具有多个框的框线上绘制一条线（使用abline）。

在开发的第一阶段没有问题。一切看起来都很好。

要注意的是，由于该应用程序中有许多潜在的箱型图，我要求用户选择它想要为更友好的界面看到的箱型图。

由于我已经实现了选择选项，R似乎在使用“ abline”命令时遇到了麻烦。

在下面的代码中，您可以看到我使用的两种方法：

abline(h = UserData$X, col = "red") 从而导致以下错误消息： Warning: Error in $: object of type 'closure' is not subsettable [No stack trace available]，可惜我无法解密。
abline(h = input$Num_B, col = "red") 我不喜欢它，因为它不使用用户认可的数据框。这里没有错误消息，但也没有一行。

有解决此问题的想法吗？

非常感谢大家，美好的一天！

我的简化代码供您使用：

library(shiny)

#UI:
# 1* 2 numeric input from user (Num_A & Num_B) which will be use as a line across the boxplots
# 2* Navbarmenu with 1 tab (for a simpler reading) where the user can chose to display one of 2 boxplots
#    -> The boxplot are there but not the line defined by the input

#Server
# 1* Get the main database file from the computer and order the box plot for further use
# 2* Collect user's inputs in a dataframe
# 3* Construction of the plots

ui <- fluidPage(
############################## 1
  navbarPage(title = "App title",
             tabPanel("User's input tab",
                      titlePanel("Input from user"),
                      sidebarLayout(
                        sidebarPanel("Fancy sidebar"
                                     ),
                        mainPanel(
                        numericInput("Num_A","1rst user input", value = 1, min=0),
                        numericInput("Num_B","2nd user input", value = 1, min=0),
                        actionButton(inputId = "UserValid",label = "User says go!"),
                        )#end mainpanel
            )#end sidebarlayour
            )#end second tab,
############################## 2
              navbarMenu(title = "Menu tab",
                tabPanel("Graph panel",
                titlePanel("Boxplot"),
                sidebarLayout(
                  sidebarPanel(
                    selectInput("graph", "Choose a graph to view:", 
                                choices = c("Plot1", "Plot2")),
                      actionButton(inputId = "BamUpdate", label = "Update")
                    ),#end sidebarpanel
                  mainPanel(
                    plotOutput("selected_graph")
                    )#end mainpan
                  )#end sidebarlayout BaM
                )#end tabPanel BaM
              )#end navbarMenu
)#end Navbarpage
)#end ui


server <- function(input, output) {
############################## 1
  DB1 <- read.csv2("~/Documents/Cours/Memoire/DT_2.0/ShinyDT/Main/DB1_Comp.csv", row.names = 1, sep=",", dec=".")
  DB1$GRP<-factor(DB1$GRP, levels=c("PmPte+","PmPte-","ItEte+","ItEte-","Tm"))
############################## 2
  UserData <- eventReactive(input$UserValid,{
    data.frame(X=input$Num_A,Y=input$Num_B) 
  })
############################## 3
  plot1 <- eventReactive(input$BamUpdate,{
    boxplot(DB1$SBL~DB1$GRP, main="Plot 1 title", col=c("gray24","green","orangered","blue","saddlebrown"),ylab="Unit",cex.lab=1.2,cex.axis=1.2)
    abline(h = UserData$X, col = "red")
  })
  plot2 <- eventReactive(input$BamUpdate,{
    boxplot(DB1$SSS~DB1$GRP, main="Plot 2 title", col=c("gray24","green","orangered","blue","saddlebrown"),ylab="Unit",cex.lab=1.2,cex.axis=1.2) 
    abline(h = input$Num_B, col = "red")
  })
  graphInput <- eventReactive(input$BamUpdate,{
    switch(input$graph,
           "Plot1" = plot1(),
           "Plot2" = plot2()
    )
  })
  output$selected_graph <- renderPlot({ 
    graphInput()
  })
}#end server


shinyApp(ui = ui, server = server)

R闪亮：Abline不会出现在箱线图中

0 个答案: