我正在尝试制作一张 map ,以便我可以选择要显示的数据点组。它确实有效,直到我尝试“改进”我的图例,即通过在其中包含不同类型的标记。
现在,我的点显示正确,图例也显示正确,但是当我取消选中其中一个组时,没有任何反应。知道如何解决这个问题吗?我已经花了几个小时研究它,但还是想不通。
干杯!
这是我的代码:
library("leaflet")
df <- data.frame(name = c("A", "B", "C"),
type = c("Always", "Often", "Never"),
city = c("Paris", "Marseille", "Bordeaux"),
lat = c(48.9, 43.3, 44.8),
long = c(2.3, 5.4, -0.6))
#Create list of icons
IconSet <- awesomeIconList(
"Always" = makeAwesomeIcon(icon = "map-marker", markerColor = "green", library = "glyphicon"),
"Often" = makeAwesomeIcon(icon = "map-marker", markerColor = "blue", library = "glyphicon"),
"Never" = makeAwesomeIcon(icon = "map-marker", markerColor = "red", library = "glyphicon"))
#Create groups
groups <- c("Always" <- "<div style='position: relative; display: inline-block' class='awesome-marker-icon-green awesome-marker'><i class='glyphicon glyphicon-map-marker icon-white '></i></div>Always displayed",
"Often" <- "<div style='position: relative; display: inline-block' class='awesome-marker-icon-blue awesome-marker'><i class='glyphicon glyphicon-map-marker icon-white '></i></div>Often displayed",
"Never" <- "<div style='position: relative; display: inline-block' class='awesome-marker-icon-red awesome-marker'><i class='glyphicon glyphicon-map-marker icon-white '></i></div>Never displayed")
#Create map
m <- leaflet() %>%
addTiles(options = providerTileOptions(minZoom = 5, maxZoom = 9)) %>%
setView(lng = 2.4, lat = 46.5, zoom = 5) %>%
addAwesomeMarkers(icon = ~IconSet[type],
clusterOptions = markerClusterOptions(freezeAtZoom = 9),
data = df, lng = ~long, lat = ~lat,
group = ~groups[type]) %>%
addLayersControl(overlayGroups = groups, options = layersControlOptions(collapsed = FALSE), position = "topleft")
m
最佳答案
我找到了解决方案……这是一个非常愚蠢的问题。
与常规标记不同,data =
显然不能在 addAwesomeMarkers()
中定义,而是在 leaflet()
中定义...
最后一点工作代码变为:
m <- leaflet(data = df) %>%
addTiles(options = providerTileOptions(minZoom = 5, maxZoom = 9)) %>%
setView(lng = 2.4, lat = 46.5, zoom = 5) %>%
addAwesomeMarkers(icon = ~IconSet[type], group = ~groups[type]) %>%
addLayersControl(overlayGroups = groups, options = layersControlOptions(collapsed = FALSE), position = "topleft")
关于r - 无响应的 Leaflet 的 addLayersControl(),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57169251/