Question

我正在构建一个应用程序，该应用程序允许用户使用selectInput在可打印图上动态添加和删除迹线。

我试图从plotly包中尝试使用plotlyProxy（）和plotlyProxyInvoke（）。

下面是我的基本代码：

  library(shiny)
  library(shinydashboard)
  library(plotly)


    ui <- dashboardPage(
       dashboardHeader(),
       dashboardSidebar(
       sidebarMenu(
        menuItem("Search", tabName = "Tabs", icon = icon("object-ungroup"))

        )
       ),
      dashboardBody(
      tabItem(tabName = "Tabs",
             fluidRow(
             column(width=3, 
                 box(
                   title="SELECT ",
                   solidHeader=TRUE,
                   collapsible=TRUE,
                   width=NULL,
                   selectInput(
                     inputId="Player",
                     selected = NULL, multiple = TRUE,
                     label=" Choose Player", 
                     choices=c("Messi", "Suarez", "Ronaldo" )),
                   selectInput(
                     inputId="Delete",
                     selected = NULL, multiple = TRUE,
                     label=" Choose Player", 
                     choices=c("Messi", "Suarez", "Ronaldo" )),
                   submitButton("Select")
                 )
          ),

          column( width=9,
                  tabBox(
                    width="100%",
                    tabPanel("tab1", 
                             plotlyOutput("Plot1")
                    )))))))

     server <- function(input, output, session) {
           output$Plot1 <-  renderPlotly({

          goals <- data.frame(Name = c("Messi", "Suarez", "Ronaldo", "Messi", "Suarez", "Ronaldo", "Messi", "Suarez", "Ronaldo" ), 
                    Number= c(47, 35, 40, 49, 32, 31, 51, 49, 44 ),
                    Year = c("2018","2018","2018", "2017", "2017", "2017", "2016","2016","2016")
   )  

         plot_ly(goals, x = ~Year, y = ~Number, type = 'scatter', mode = 'lines', color = ~input$Player )%>% layout(showlegend = TRUE)%>%
  layout(title = 'Number of goals')
 })

     # plotly.addTraces
   observeEvent(input$Player, {
       plotlyProxy("Plot1", session) %>%
        plotlyProxyInvoke("addTraces", list(x = ~Year, 
                                      y = ~Number,
                                      type = 'scatter',
                                      mode = 'lines'))
         })

       # plotly.deleteTraces
       observeEvent(input$Delete, {
        plotlyProxy("Plot1", session) %>%
        plotlyProxyInvoke("deleteTraces")
         })
       }
   shinyApp(ui, server)

有没有一种方法可以动态使用 plotlyProxyInvoke（）添加和删除跟踪，而不必使用 addTrace（）对跟踪进行硬编码？

Answer 1

这是一种解决方法，可以在将data.frame传递到plotlyProxy()之前通过过滤{.1}：

plot_ly

动态地在光泽上添加绘图轨迹

1 个答案: