在 Shiny 中两次使用相同的输出元素 [英] Using the same output element twice in Shiny
问题描述
示例取自 Shiny 画廊.我想在第一个选项卡上显示 ex1 和 ex2,在第二个选项卡上的 ex2 和 ex2 之间有一些中断.
Example taken from Shiny gallery. I would like to show ex1 and ex2 on the first tab, with some breaks between and ex2 on the second tab.
ui.R
navbarPage(
title = 'DataTable Options',
tabPanel('Display length', DT::dataTableOutput('ex1')),
tabPanel('Length menu', DT::dataTableOutput('ex2'))
)
server.R
function(input, output) {
# display 10 rows initially
output$ex1 <- DT::renderDataTable(
DT::datatable(iris, options = list(pageLength = 25))
)
# -1 means no pagination; the 2nd element contains menu labels
output$ex2 <- DT::renderDataTable(
DT::datatable(
iris, options = list(
lengthMenu = list(c(5, 15, -1), c('5', '15', 'All')),
pageLength = 15
)
)
)
}
我认为下面的代码会起作用,但它不会.它确实在任何选项卡中显示任何内容.
I thought the following code would work, but it does not. It does show anything in any of the tabs.
navbarPage(
title = 'DataTable Options',
tabPanel('Display length', DT::dataTableOutput('ex1'),
HTML("<br><br><br>"),
DT::dataTableOutput('ex2')),
tabPanel('Length menu', DT::dataTableOutput('ex2'))
)
推荐答案
你的 ui 代码很好,但是:
Your ui code is fine, but:
Shiny 不支持多个同名输出.这段代码将生成两个元素具有相同 ID 的 HTML,即无效的 HTML.
Shiny doesn't support multiple outputs with the same name. This code would generate HTML where two elements have the same ID, which is invalid HTML.
所以,我认为您唯一的解决方案是创建第三个表.最好的选择是在中间使用反应式,这样你就可以避免两次使用相同的代码.
So, I think your only solution would be to create a third table. The best option is to use a reactive in the middle, so you avoid having the same code used twice.
function(input, output) {
# display 10 rows initially
output$ex1 <- DT::renderDataTable(
DT::datatable(iris, options = list(pageLength = 25))
)
# -1 means no pagination; the 2nd element contains menu labels
iris_table <- reactive({
DT::datatable(
iris, options = list(
lengthMenu = list(c(5, 15, -1), c('5', '15', 'All')),
pageLength = 15
)
)
})
output$ex2 <- DT::renderDataTable(
iris_table()
)
output$ex3 <- DT::renderDataTable(
iris_table()
)
}
希望这有帮助!
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