r Shiny中的fileInput函数没有响应

Question

我是 R 和 R shiny 的新手，并且一直致力于组合一个统计应用程序，该应用程序将允许用户导入文件，然后对数据运行不同的统计程序。直到最近，fileData 函数对我来说一直运行良好，现在每当我尝试上传文件时，什么都不会打开。我已经尝试了所有我能想到的让它运行​​的方法，但似乎该文件不会附加到该函数。任何帮助将不胜感激！

library(shiny)
library(shinyFiles)
library(dplyr)
library(shinythemes)

ui <- fluidPage(theme = shinytheme("cosmo"),
# Application title
titlePanel("Stats"),

# Sidebar
sidebarLayout(
    sidebarPanel(
        tabsetPanel(type = "tab", 
                    tabPanel("SCI",

                        fileInput("file1", "Insert File", multiple = TRUE, accept = c("text/csv", "text/comma-separated-values, text/plain", ".csv")),

                        selectInput("statChoice", "Choose Stats", c("None" = "None", "ANOVA 0 w/in 1 btw" = "A1btw", "ANOVA 0 w/in 2 btw" = "A2btw")),

                            conditionalPanel("statChoice == 'A1btw'",
                                uiOutput("ind1"),
                                uiOutput("dep1")),

                            conditionalPanel("statChoice == 'A2btw'",
                                uiOutput("ind1"),
                                uiOutput("ind2"),
                                uiOutput("dep1")),
            )
        )
    ),

    # Show a plot of the generated distribution
    mainPanel(
       tabsetPanel(type = "tab",
                   tabPanel("Data", 
                            dataTableOutput("fileData")),
                   tabPanel("Summary Statistics"),
                   tabPanel("Graphs"))
    )
    )
)

server <- function(input, output) {
fileData <- eventReactive(input$file1,{
    read.csv(input$file1$dataPath, header = TRUE, sep = ",", dec = ".")
})

output$fileData <- renderDataTable(
    fileData()
)

vars <- reactive({
    names(fileData())
})

output$ind1 <- renderUI({
    selectInput("var1", "Independent 1", choices = vars())
})

output$ind2 <- renderUI({
    selectInput("var2", "Independent 2", choices = vars())
})

output$dep1 <- renderUI({
    selectInput("var3", "Dependent 1", choices = vars())
})
}

shinyApp(ui = ui, server = server)

Answer 1

很棘手，因为 Shiny 没有对此发出任何警告：
shiny app will not work if the same "output" is used two times in Ui.R.

一切看起来都不错，除了uiOutput("dep1") 和uiOutput("ind1") 的双重使用：

conditionalPanel("statChoice == 'A1btw'",
    uiOutput("ind1"),  # Used once
    uiOutput("dep1")), # Used once

conditionalPanel("statChoice == 'A2btw'",
    uiOutput("ind1"),  # Used twice
    uiOutput("ind2"),
    uiOutput("dep1")), # Used twice

您应该只使用一次输出。