如何使用R在DataTable结果中标记最后一行 [英] How to mark last row in results of DataTable using R

问题描述

我想标记（例如，粗体）使用DT包生成的数据表中的最后一行。
假设我们有一个包含虹膜数据集的表：

I would like to mark (for instance bold) the last row in Data Table generated using DT package. Let's say we have a table with the iris dataset:

library(DT)
datatable(iris)

结果：

所以我们有150行，而我想加粗仅150行。

So we have 150 rows and I would like to bold only 150 row.

编辑：
@BigDataScientist让我清除它。我有这个：

Edit: @BigDataScientist let me clear this. I have this:

 output$tbl <- 
    DT::renderDataTable(
      data() %>% # let's say iris data - it doesn't matter
      bind_rows(summarise(data(), SUM = "SUM", A = sum(A), B = sum(B), 
                           C = sum(C), D = sum(D), 
                           E = sum(E), F = sum(F))) %>%
      mutate(SUM = rowSums(.[2:6])),
    extensions = 'Buttons', 
    options = list(
      dom = 'Blfrtip',
      lengthMenu = list(c(-1, 5, 10, 15, 20, 25), c('All', '5', '10', '15', '20', '25')),
      buttons = list('copy',
                     list(extend = 'excel',
                          filename = 'report'),
                     list(extend = 'pdf',
                          filename = 'report'),
                     'print'),
     rownames = FALSE,
     server = FALSE
    ) %>%
    formatStyle(
     target = "row",
     fontWeight = styleEqual(dim(.)[1], "bold")
    )
 )

因此，我想在最后一行添加粗体；在这种情况下，列的总和；到这个管道，因此一切都将合为一体（一个管道）。

So, I would like to add bolding last row; in this case, SUM of columns; to this pipeline, so everything would be in one piece (one pipeline).

推荐答案

此页面将为您提供帮助：

formatStyle(
  datatable(iris), 0, target = "row",
  fontWeight = styleEqual(dim(iris)[1], "bold")
)

编辑 ：（另外）要求将数据作为 reactive（）传递带有闪亮管道。好吧，我只能提供一种解决方法。我不太熟悉管道，尤其是如何传递几个参数。

It was asked (in addition) for the data to be passed as reactive() with pipes in Shiny. Well, i can only offer a workaround. I am not that familiar with pipes, especially how to pass several arguments.

shinyApp(
  ui = fluidPage(fluidRow(column(12, DT::dataTableOutput('tbl')))),
  server = function(input, output) {
    irisReact <- reactive(iris)
    dimIrisReact <- reactive(dim(iris)[1])    
    output$tbl = DT::renderDataTable(
      irisReact() %>% datatable() %>% formatStyle(
        0, target = "row",
        fontWeight = styleEqual(dimIrisReact(), "bold")
      )
    )
  }
)

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