本文介绍了在R SHINY中创建向下钻取报告的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试显示列数为‘n’的数据表,如下所示

Begin Date | EndDate | Month | Year | Count of Students
2/1/2014 | 1/31/2015 | Jan | 2014 | 10
3/1/2014 | 2/28/2015 | Feb | 2014 | 20
4/1/2014 | 3/31/2015 | Mar | 2014 | 30
5/1/2014 | 4/30/2015 | Apr | 2014 | 40
我希望通过启用向下钻取/钻取功能使该数据表具有交互性,在该功能中,用户可以单击"学生人数"字段中的每个值,以查看数字10、20、30和40背后的底层原始数据。例如,如果用户点击"10",他/她应该能够看到该计数后面的学生原始数据。这类似于EXCEL中的透视表概念,用户可以在其中看到透视表背后的基础数据。有没有办法用R SHINY做同样的事情?

推荐答案

是,使用DT包捕获所选行并子集主集。以下是使用iris集合的示例:

library("dplyr")
library("shiny")
library("DT")

# create a summary table
summary_iris <- group_by(iris, Species) %>%
  summarise(Count = n())

ui <- fluidPage(
  dataTableOutput("summary")
  , dataTableOutput("drilldown")
)


server <- function(input, output){

  # display the data that is available to be drilled down
  output$summary <- DT::renderDataTable(summary_iris)

  # subset the records to the row that was clicked
  drilldata <- reactive({
    shiny::validate(
      need(length(input$summary_rows_selected) > 0, "Select rows to drill down!")
    )

    # subset the summary table and extract the column to subset on
    # if you have more than one column, consider a merge instead
    # NOTE: the selected row indices will be character type so they
    #   must be converted to numeric or integer before subsetting
    selected_species <- summary_iris[as.integer(input$summary_rows_selected), ]$Species
    iris[iris$Species %in% selected_species, ]
  })

  # display the subsetted data
  output$drilldown <- DT::renderDataTable(drilldata())
}

shinyApp(ui, server)

这篇关于在R SHINY中创建向下钻取报告的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

06-22 02:16