Targeting/Adding traces in subplot

[klar-C]

Hi - I'm trying to add/change traces in a graph with subplots. Below the example code.

It looks like each subplot becomes one trace (based on playing with the restyle section), but it is unclear to me how to add/remove traces. I changed the addTraces number at the end to 0-3 but it always adds it to the first subplot.

Any help would be appreciated.

data <- tibble(runmonth=c(1,1,1,1,4,4,4,4),variable=c('a','a','b','b','a','a','b','b'),x=c(1:8),y=c(8:1),keyname=paste0('k',c(1:8)))

p <- data %>% group_by(runmonth,variable) %>%
  do(
    p = highlight_key(., ~keyname,group='scattergroup') %>%
      plot_ly(showlegend = FALSE) %>%
      add_markers(
        x = ~x, y = ~y
      )
  ) %>%
  subplot(
    nrows = 2, margin = 0.01,
    shareY = TRUE, shareX = TRUE, titleY = FALSE
  ) %>% toWebGL() %>%
  highlight(
    on = "plotly_selected",
    off = c('plotly_relayout')
  )


ui <- function(id) {
  div(
    actionButton('go','go'),
    plotlyOutput("scattergr")
  )
}

server <- function(input,output,session) {
  
  output$scattergr <- renderPlotly({p})
  
  observeEvent(input$go,{
    plotlyProxy("scattergr", session) %>%
      plotlyProxyInvoke(
        "restyle",
        list(
          'marker.symbol' = list(c(rep('triangle-up',1),'circle'))
        ),
        list(0,1,2,3)
      ) %>%
      plotlyProxyInvoke(
        "addTraces",
        list(
          x = c(50,60),
          y = c(50,60),
          mode = "scatter"
        ),1
      ) %>%
      plotlyProxyInvoke(
        "moveTraces",
        -1,0
      )
  })
  

}

runApp(shinyApp(ui, server))