通过使用textArea或加载文件来过滤闪亮的数据表

时间:2019-04-12 21:22:15

标签: r shiny shinydashboard shiny-reactivity

我想创建一个使用shinyFiles加载文件的闪亮应用程序,那么用户应该能够通过以下方式过滤数据表:

a)使用textArea输入,用户可以在其中粘贴一些值,数据表将被过滤

b)用户上传一个文件,然后通过上传文件中的值对数据表进行过滤(上传的文件应该是带有标题和逐行基因的文件)

这是我的代码,但是如果我在同一textAreaInput中使用shinyFilesButtontabItem,则无法创建过滤器数据集。我想将其保留在相同的tabItem上,而不要创建两个不同的tabItems

问题是,当我上传文件时,它可以正常运行,但是如果我输入textAreaInput却没有任何反应,我想创建一个删除过滤器或类似的过滤器,使我可以运行一个或另一个过滤器。

这是我到目前为止的代码:

header <- dashboardHeader()

    sidebar <- dashboardSidebar(
      sidebarUserPanel("Panelado variantes"),
      sidebarMenu(
        # Setting id makes input$tabs give the tabName of currently-selected tab
        id = "tabs",
        menuItem("Archivo variantes", tabName = "fileupload", icon = icon("table")),
        conditionalPanel("input.tabs == 'fileupload' ",
        shinyFilesButton("file", "Choose a file" , multiple = FALSE, title = "Please select a file:",buttonType = "default", class = NULL)#,
        ),
        menuItem("Panelado por genes", tabName="panelado"),
        conditionalPanel("input.tabs == 'panelado'",
          shinyFilesButton("file_gene", "upload gene list" , multiple = FALSE, title = "Please upload a gene list:", buttonType = "default", class = NULL),
          textAreaInput(inputId = "genes", label = "Gene List", value = "Paste some genes", width = "180", height = "200"),
          actionButton("go", "Filter")
          )   
      )
    )

    body <- dashboardBody(
      tags$style(type="text/css",
          ".shiny-output-error { visibility: hidden; }",
          ".shiny-output-error:before { visibility: hidden; }",
          ".shiny-output-error:after { visibility: hidden; }"),

      tabItems(
        tabItem(tabName = "fileupload",
            fluidPage(
              box(width=12, height = '1000px',      
              column(12,dataTableOutput("tabla"))
              )
            )
        ),

        tabItem("panelado",
          fluidPage(
            box(width=18, height = '950px',
            column(12,dataTableOutput("tablafilt")))
          )
        )
      )
    )

    ui <- dashboardPage(header, sidebar, body)

    server = function(input, output, session) {

      volumes = getVolumes()
      volumes <- c(Home = fs::path_home(), "R Installation" = R.home(), getVolumes()())

       file_selected <- reactive({
         shinyFileChoose(input, "file", roots = volumes, session = session)
         if (is.null(input$file))
           return(NULL) 
         print(parseFilePaths(volumes, input$file)$datapath)
         return(parseFilePaths(volumes, input$file)$datapath)
       })   

       contents <- reactive({
         if (is.null(file_selected()))
           return()
           df <- read.delim(file_selected(), header = TRUE, stringsAsFactors=FALSE, as.is=TRUE)
           return(df)
        })

      output$tabla <- DT::renderDataTable({        
        if(is.null(contents()))
          return()
          datos <- contents()
          DT::datatable(datos)
        })

      file_selected2 <- reactive({
      shinyFileChoose(input, "file_gene", roots = volumes, session = session)
        if (is.null(input$file_gene))
           return(NULL) 
        return(parseFilePaths(volumes, input$file_gene)$datapath)
      })   

      gene_list <- reactive({
         if (is.null(file_selected2()))
           return()
           df <- read.delim(file_selected2(), header = TRUE, stringsAsFactors=FALSE, as.is=TRUE)
           genes <- as.character(df[,1])
      })

      filtrado1 <- reactive({
        if (is.null(file_selected2()))
          return()
        df <- filter(contents(), Gene.refGene %in% gene_list())
      })

      glist <- reactive({
        glist <- isolate(input$genes)
        print (glist)
        gnames <- gsub(" ","",glist,fixed=TRUE)
        names <- unlist(strsplit(gnames,"\n"))
        genes <- as.character(names)          
      })

      filtrado2 <- reactive({
        if (is.null(glist()))
          return()
        df <- filter(contents(), Gene.refGene %in% glist())
      })

      output$tablafilt <- DT::renderDataTable({
        if(is.null(contents()))
          return()

        filtrado <- reactive({
          if (!is.null(filtrado1())){
            df <- filtrado1()
          }
          else if (!is.null(filtrado2())){
            df <- filtrado2()
          } 
        })

        DT::datatable(filtrado()) 

      })
    }

    shinyApp(ui, server) 

0 个答案:

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