R 传单 map - 根据所选图层组更改图例

Question

我正在制作 R 传单 map (不是 Shiny)，我有两个控制组，根据选择，我希望不同的图例变得可见。目前我只能设法让这两个图例始终可见。

下面是传单 map 的代码，输出可以在图像中看到。

leaflet() %>% addSearchOSM() %>% 
  addProviderTiles(providers$CartoDB.Positron,
                   options = providerTileOptions(noWrap = TRUE),
                   group = "kaart") %>%
  # addFullscreenControl() %>%
  addCircleMarkers(data = table@data,
             lat = ~lng, 
             lng = ~lat,
             color = ~palverbruikplaats(Verbruiksplaats),
             label = bepaalPopup(),
             group = "Verbruikplaatscircles"
             )%>%
  addCircleMarkers(data = table@data,
                   lat = ~lng, 
                   lng = ~lat,
                   color = ~palstatus(`Status omschrijving`),
                   label = bepaalPopup(),
                   group = "statuscircles"
                    )%>%
  leaflet::addLegend("bottomleft", pal = palverbruikplaats, values = verbruikplaatsuniek, title = "Legenda") %>%
  leaflet::addLegend("bottomleft", pal = palstatus, values = statusuniek, title = "Legenda") %>%
  addLayersControl(baseGroups = c("Verbruikplaatscircles", "statuscircles"),
                      options = layersControlOptions(collapsed = FALSE))

Answer 1

在您的 addLayersControl你的意思是设置 overlayGroups参数而不是 baseGroups ?

library(leaflet)
leaflet() %>%
  addTiles(group = "OpenStreetMap") %>%
  addCircleMarkers(runif(20, -75, -74), runif(20, 41, 42), group = "Markers1", color ="red") %>%
  addMarkers(runif(20, -75, -74), runif(20, 41, 42), group = "Markers2") %>%
  addLegend(values = 1, group = "Markers1", position = "bottomleft", labels = "1", colors= "red") %>%
  addLegend(values = 2, group = "Markers2", position = "bottomleft", labels = "2" ,colors= "blue") %>%  
  addLayersControl(overlayGroups = c("Markers1", "Markers2"),
                   options = layersControlOptions(collapsed = FALSE))