Rstudio閃亮的renderDataTable標題多行？

Question

我在Rstudio Shiny中有一個renderDataTable表，我用一些列構建我想讓標題變為多行，這樣一個長標題字符串會占用少量的水平空間。 例如：

我的長標題列在我的data.frame中被稱為a_very_long_header ，並且使用下面的colnames技巧我可以將它變成a-very-long-header ，然后變成一個丑陋的多行標題：

shinyServer(function(input, output, session) {
  output$dt <- renderDataTable({
  data =     data.frame(a_very_long_header=rnorm(10),a=rnorm(10),b=rnorm(10),c=rnorm(10),d=rnorm(10),e=rnorm(10),f=rnorm(10),g=rnorm(10),h=rnorm(10),i=rnorm(10),j=rnorm(10),k=rnorm(10),a1=rnorm(10),b1=rnorm(10),c1=rnorm(10),d1=rnorm(10),e1=rnorm(10),f1=rnorm(10),g1=rnorm(10),h1=rnorm(10),i1=rnorm(10),j1=rnorm(10),k1=rnorm(10))
  colnames(data) = c("a-very-long-header","a","b","c","d","e","f","g","h","u","j","k","a1","b1","c1","d1","e1","f1","g1","h1","u1","j1","k1")
    return(data)
   })
})


shinyUI(navbarPage("Foo", id="page", collapsable=TRUE, inverse=FALSE,
   tabPanel("Bar",
       dataTableOutput("dt")
      )
   )
)

有沒有更優雅的方法將a_very_long_header轉換為a very long header以便它以多行打印標題？

Answer 1

使用HTML

library(shiny)
runApp(list(
  server = function(input, output, session) {
  output$dt <- renderDataTable({
    data =     data.frame(a_very_long_header=rnorm(10),a=rnorm(10),b=rnorm(10),c=rnorm(10),d=rnorm(10),e=rnorm(10),f=rnorm(10),g=rnorm(10),h=rnorm(10),i=rnorm(10),j=rnorm(10),k=rnorm(10),a1=rnorm(10),b1=rnorm(10),c1=rnorm(10),d1=rnorm(10),e1=rnorm(10),f1=rnorm(10),g1=rnorm(10),h1=rnorm(10),i1=rnorm(10),j1=rnorm(10),k1=rnorm(10))
    colnames(data) = c("a very<br>long header","a","b","c","d","e","f","g","h","u","j","k","a1","b1","c1","d1","e1","f1","g1","h1","u1","j1","k1")
    return(data)
  })
}
, ui = navbarPage("Foo", id="page", collapsable=TRUE, inverse=FALSE,
                   tabPanel("Bar",
                            dataTableOutput("dt")
                   )
)
)
)