有人能解释一下DT:：dataTableProxy是如何工作的吗？

我一直在努力掌握如何使DT:：dataTableProxy在我的应用程序中工作，但我无法通过返回所选列的操作

下面的示例中，我尝试修改代码以打印描述性统计数据（使用

pastecs

）。但唯一呈现的是选定的文本列

#modified UI, adding another verbatimTextOutput

ui = 
...
verbatimTextOutput('foo2')

server = 
...
  output$foo2= renderPrint({
    x<-input$foo_columns_selected
    stat.desc(x)
  })

结果:

以下答案对非常有帮助：&

require(DT)
library(dplyr)
library(tibble)

ui<-
  fluidPage(

    selectInput('obj','Choose Name:', choices = c('',my.data$Name), selectize = TRUE),
    dateRangeInput('daterange',"Date range:",
                   start= min(my.data$Date),
                   end = max(my.data$Date)),

    mainPanel(
      dataTableOutput('filteredTable'),
      dataTableOutput('filteredTable2'),
      tableOutput('table')
    )
)

server<-function(input,output, session){



  filteredTable_data <- reactive({

    my.data %>% rownames_to_column() %>%  ##dplyr's awkward way to preserve rownames

      filter(., Name == input$obj) %>%
      filter(., between(Date ,input$daterange[1], input$daterange[2])) %>%
      column_to_rownames()

    })

##explicit assignment to output ID

  DT::dataTableOutput("filteredTable")

  output$filteredTable <- DT::renderDataTable({

    datatable(

      filteredTable_data(),

      selection = list(mode = "multiple"),

      caption = "Filtered Table (based on cyl)"

       )

    })

  filteredTable_selected <- reactive({
    ids <- input$filteredTable_rows_all
    filteredTable_data()[sort(ids),]  ##sort index to ensure orig df sorting
  })

  ##anonymous
  output$filteredTable2<-DT::renderDataTable({

    x<-filteredTable_selected() %>% select(starts_with("Value"))

    x<-as.data.frame(stat.desc(x))

    datatable(
      x)

  })

}

shinyApp(ui, server)