我有一个sidebarLayout
应用,我在其中设置了按钮,以便在tabPanel
中添加和删除sidebarPanel
。但是,我无法弄清楚如何自定义这些tabPanel。我的代码如下:
library(shiny)
ui <- fluidPage(
sidebarLayout(
sidebarPanel(width = 3, fixed=T,
h3("L2 Machine"),
actionButton('moreL2', tags$b('Add L2')),
actionButton('lessL2', tags$b('Remove L2')),
uiOutput('panelset'),
tabPanel("L2panel",
numericInput(inputId='L2amount', 'Select L2 Amount', value=0),
selectInput(inputId='L2type', 'Select L2 Type', c('Percent', 'Absolute')),
uiOutput('L2daterange')
)
),
mainPanel(
verbatimTextOutput('L2a'),
verbatimTextOutput('L2t')
)
)
)
server <- function(input, output) {
output$L2a <- renderPrint(input$L2amount)
output$L2t <- renderPrint(input$L2type)
output$panelset <- renderUI({
n <- seq(max(input$moreL2 - input$lessL2 + 1, 1))
tabList <- lapply(paste("Pan", n), tabPanel)
do.call(tabsetPanel, tabList)
})
output$L2daterange <- renderUI({
dateRangeInput(inputId='L2daterange',
label='Select Adjustment Period',
start='01-01-2010', end='01-12-2015'
)
})
}
shinyApp(ui, server)
目前,我numericInput()
内有selectInput()
,uiOutput()
和tabPanel()
。相反,我希望通过单击按钮&#34;添加L2&#34;创建每个tabPanel
。拥有它自己的numericInput
,selectInput
和uiOutput
。
答案 0 :(得分:2)
您确实创建了不同的tabPanel但它们是空的 - numericInput
和selectInput
都不在动态tabPanel中。该解决方案基于https://gist.github.com/wch/5436415/,你可以找到一个广泛的解释,为什么你需要一个函数local
来呈现带有for循环的输出。
如上所述,您创建了正确的动态tabPanel但它们是空的。在lapply
中,您应该将唯一小部件指定为tabPanel
的参数。
output$panelset <- renderUI({
n <- seq(max(input$moreL2 - input$lessL2 + 1, 1))
tabList <- lapply(paste("Pan", n), tabPanel)
do.call(tabsetPanel, tabList)
})
在这里,我编写了一个如何以正确方式执行此操作的示例。每次使用一组唯一的小部件创建唯一的tabPanel时。
tabList <- lapply(n, function(i) {
tabPanel(
title = paste0('Pan', i),
numericInput(inputId = paste0('L2amount', i), 'Select L2 Amount', value = 0),
selectInput(inputId = paste0('L2type', i), 'Select L2 Type', c('Percent', 'Absolute')),
dateRangeInput(inputId = paste0('L2daterange',i),
label = 'Select Adjustment Period',
start = '01-01-2010', end = '01-12-2015'))
})
do.call(tabsetPanel, tabList)
})
然后,对于每个具有唯一小部件集的tabPanel,您必须创建唯一的输出集,然后才能呈现小部件的值。
完整解决方案:
library(shiny)
ui <- fluidPage(
sidebarLayout(
sidebarPanel(width = 3, fixed=T,
h3("L2 Machine"),
actionButton('moreL2', tags$b('Add L2')),
actionButton('lessL2', tags$b('Remove L2')),
uiOutput('panelset')
),
mainPanel(
uiOutput("dynamic")
)
)
)
TMAX <- 10 # specify maximal number of dynamic panels
server <- function(input, output) {
output$panelset <- renderUI({
n <- seq(max(input$moreL2 - input$lessL2 + 1, 1))
# You have to create each time a new set of unique widgets
tabList <- lapply(n, function(i) {
tabPanel(
title = paste0('Pan', i),
numericInput(inputId = paste0('L2amount', i), 'Select L2 Amount', value = 0),
selectInput(inputId = paste0('L2type', i), 'Select L2 Type', c('Percent', 'Absolute')),
dateRangeInput(inputId = paste0('L2daterange',i),
label = 'Select Adjustment Period',
start = '01-01-2010', end = '01-12-2015'))
})
do.call(tabsetPanel, tabList)
})
output$dynamic <- renderUI({
n <- seq(max(input$moreL2 - input$lessL2 + 1, 1))
# You want to render n-times different outputs and each time you have
# k different outputs -- > need a list within a list.
lapply(n, function(i) {
list(
h5(paste0("Pan", i, " widgets")),
verbatimTextOutput(paste0('L2a', i)),
verbatimTextOutput(paste0('L2t', i)),
verbatimTextOutput(paste0('L2dat', i)),
br()
)
})
})
for (i in 1:TMAX) {
local({
my_i <- i
# Outputs
L2a <- paste0('L2a', my_i)
L2t <- paste0('L2t', my_i)
L2dat <- paste0('L2dat', my_i)
list(
output[[L2a]] <- renderPrint({ input[[paste0('L2amount', my_i)]] }),
output[[L2t]] <- renderPrint({ input[[paste0('L2type', my_i)]] }),
output[[L2dat]] <- renderPrint({ input[[paste0('L2daterange', my_i)]] })
)
})
}
}
shinyApp(ui, server)