我正在尝试创建一个基于模块的Shiny App,我需要在模块内添加一个highchart
,当用户从selectInput
下拉列表中选择一个值时,图形就会更新。这个想法是,当用户从UI中的selectInput
框中选择一个值时,这将过滤数据集,然后highchart
被更新。问题是我无法将过滤后的数据集传递到myModuleServer
(请参见下文)。我该怎么办?
这是数据集:
df <- data.frame(label = c('A','B'), value = c(10,25))
这些是UI和Server模块:
myModuleUI <- function(id) {
ns <- NS(id)
tagList(
textOutput(ns("title")),
textOutput(ns("text")),
highchartOutput(ns("graph")))}
myModuleServer <- function(input, output, session, action, dataset) {
output$title <- renderText({paste0("You selected letter: ",action())})
output$text <- renderText({paste0("In the dataset the letter selected corresponds to number: ", dataset()$value)})
output$graph <- renderHighchart({hchart(dataset(), 'bar', hcaes(x=dataset()$label, y=dataset()$value))})
}
在Shiny App的UI和Server组件下面:
ui <- fluidPage(
fluidRow(
column(width = 3, wellPanel(selectInput('dummy', 'Select a letter', choices = c('A', 'B')))),
column(width = 6, myModuleUI("module1")))
)
server <- function(input, output, session) {
reactiveData <- reactive({input$dummy})
reactiveDataSet <- reactive({df %>% filter(label == input$dummy)})
callModule(myModuleServer, 'module1', action = reactiveData, dataset = reactiveDataSet)
}
shinyApp(ui, server)