r语言 - Shiny:在多个选项卡中重复使用相同的绘图不起作用

Question

我正在尝试创建一个具有两个选项卡的闪亮仪表板。

第一个选项卡(称为：dashboard(显示两个图形，另一个选项卡(称为：widgets(旨在显示第一个选项卡(称为：mpg(的第一个图形，下面是rpivottable。

问题是，当我将图形/rpivottable添加到第二个选项卡时，所有图形都消失了。

我认为当我拿走第二个选项卡的内容时，仪表板开始显示第一个选项卡的内容。知道为什么会发生这种情况以及如何解决吗？

示例代码：

library(shiny)
library(shinydashboard)
library(rhandsontable)
library(writexl)
library(readxl)
library(stringr)
library(ggplot2)
library(rpivotTable)
ui <- dashboardPage(skin = 'green',
dashboardHeader( title = "Test", titleWidth = 280),
dashboardSidebar(width = 280,  
sidebarMenu(
menuItem("Dashboard", tabName = "dashboard", icon = icon("dashboard")),
menuItem("Pivot", tabName = "widgets", icon = icon("th"))
)),
dashboardBody(
tabItems(
# First tab content
tabItem(tabName = "dashboard",
fluidRow(
column(5, 'Mpg Table') ), 
br(), 
fluidRow(
rHandsontableOutput ('mpg')),
br(),
fluidRow(
column(5,'mtcars Summary')),
br(),
fluidRow(
column(3),column(6, tableOutput ('mtcars')),column(3))
),
# Second tab content
tabItem(tabName = "widgets",
fluidRow(
column(5,'Mpg table')),
br(),
fluidRow(
rHandsontableOutput ('mpg')),
br(),
fluidRow(
rpivotTableOutput('pivot')  
)
)
)
)
)
server <- shinyServer(function(input, output) {
#mpg
output$mpg <- renderRHandsontable ({ rhandsontable({
mpg[1,]  })
})
#mtcars
output$mtcars <-renderTable ({  
head(mtcars)})
# pivot table
output$pivot <- renderRpivotTable({ rpivotTable(mtcars)})

})
shinyApp(ui, server)

Answer 1

您不能重复使用相同的 id 来绑定多个输出(看这里(。因此，一种选择是在两个选项卡中为mpg表提供唯一 id，并使用output$mpg1 <- output$mpg2 <- renderRHandsontable ({})在服务器中呈现表输出两次。

工作示例：

library(shiny)
library(shinydashboard)
library(rhandsontable)
library(writexl)
library(readxl)
library(stringr)
library(ggplot2)
library(rpivotTable)
ui <- dashboardPage(skin = 'green',
dashboardHeader(title = "Test", titleWidth = 280),
dashboardSidebar(width = 280,  
sidebarMenu(
menuItem("Dashboard", tabName = "dashboard", icon = icon("dashboard")),
menuItem("Pivot", tabName = "widgets", icon = icon("th"))
)),
dashboardBody(
tabItems(
# First tab content
tabItem(tabName = "dashboard",
fluidRow(
column(5, 'Mpg Table') ), 
br(), 
fluidRow(
rHandsontableOutput ('mpg1')),
br(),
fluidRow(
column(5, 'mtcars Summary')),
br(),
fluidRow(
column(3),
column(6, tableOutput ('mtcars')),column(3))
),
# Second tab content
tabItem(tabName = "widgets",
fluidRow(
column(5,'Mpg table')),
br(),
fluidRow(
rHandsontableOutput ('mpg2')),
br(),
fluidRow(
rpivotTableOutput('pivot'))
)
)
)
)
server <- shinyServer(function(input, output) {
#mpg
output$mpg1 <-output$mpg2<- renderRHandsontable ({
rhandsontable({
mpg[1,]})
})
#mtcars
output$mtcars <-renderTable ({
head(mtcars)})
# pivot table
output$pivot <- renderRpivotTable({rpivotTable(mtcars)})
})
shinyApp(ui, server)

Answer 2

一个简单的例子：

library(shiny)
library(shinydashboard)
ui <- dashboardPage(skin = 'green',
dashboardHeader( title = "Test", titleWidth = 280),
dashboardSidebar(width = 280,  
sidebarMenu(
menuItem(text = "Dashboard", tabName = "dashboard", icon = icon("dashboard")),
menuItem(text = "Pivot", tabName = "widgets", icon = icon("th"))
)),
dashboardBody(
tabItems(
# First tab content
tabItem(tabName = "dashboard",
fluidRow(
column(5, 'Mpg Table') ), 
br(), 
fluidRow(column(width = 12, plotOutput("plot1")
)
)),
# Second tab content
tabItem(tabName = "widgets",
fluidRow(
column(5,'Mpg table')),
br(),
fluidRow(column(width = 6, plotOutput("plot2")),
column(width = 6, plotOutput("plot3"))
),
br(),
fluidRow(column(width = 12, plotOutput("plot4"))
)
)
)
)
)
server <- shinyServer(function(input, output) {
output$plot1 <- renderPlot({
hist(rnorm(1000))
})
output$plot2 <- renderPlot({
plot(rnorm(1000), rnorm(1000))
})
output$plot3 <- renderPlot({
boxplot(rnorm(100))
})
output$plot4 <- renderPlot({
ts.plot(rnorm(100))
})
})
shinyApp(ui, server)