我有 3 个 selectInput 框和一组 4 个选项,可以通过这 3 个框进行选择。我希望 selectInputs 显示的选项在选择其他 selectInputs 时动态更改。不过,我希望所有三个框在任何时间点都可以使用“无”选项。我正在使用的代码是
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Dynamic selectInput"),
dashboardSidebar(
sidebarMenu(
menuItemOutput("menuitem")
)
),
dashboardBody(
uiOutput('heirarchy1'),
uiOutput('heirarchy2'),
uiOutput('heirarchy3')
)
)
server <- function(input, output) {
output$menuitem <- renderMenu({
menuItem("Menu item", icon = icon("calendar"))
})
heirarchy_vector<-c("NONE","A","B","C")
output$heirarchy1<-renderUI({
selectInput("heir1","Heirarchy1",c("NONE",setdiff(heirarchy_vector,c(input$heir2,input$heir3))),selected="NONE")
})
output$heirarchy2<-renderUI({
selectInput("heir2","Heirarchy2",c("NONE",setdiff(heirarchy_vector,c(input$heir1,input$heir3))),selected="NONE")
})
output$heirarchy3<-renderUI({
selectInput("heir3","Heirarchy3",c("NONE",setdiff(heirarchy_vector,c(input$heir1,input$heir2))),selected="NONE")
})
}
shinyApp(ui, server)
Any help on this will be greatly appreciated
EDIT
我尝试使用 updateSelectInput 来达到此目的。但是代码似乎没有运行
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Dynamic selectInput"),
dashboardSidebar(
sidebarMenu(
menuItemOutput("menuitem")
)
),
dashboardBody(
selectInput("heir1","Heirarchy1",c("NONE","A","B","C"),selected="NONE"),
selectInput("heir2","Heirarchy2",c("NONE","A","B","C"),selected="NONE"),
selectInput("heir3","Heirarchy3",c("NONE","A","B","C"),selected="NONE")
)
)
server <- function(input, output) {
output$menuitem <- renderMenu({
menuItem("Menu item", icon = icon("calendar"))
})
heirarchy<-c("A","B","C")
observe({
hei1<-input$heir1
hei2<-input$heir2
hei3<-input$heir3
choice1<-c("NONE",setdiff(heirarchy,c(hei2,hei3)))
choice2<-c("NONE",setdiff(heirarchy,c(hei1,hei3)))
choice3<-c("NONE",setdiff(heirarchy,c(hei1,hei2)))
updateSelectInput(session,"heir1",choices=choice1)
updateSelectInput(session,"heir2",choices=choice2)
updateSelectInput(session,"heir3",choices=choice3)
})
}
shinyApp(ui, server)