Question

我的传单图看起来像这样：

library(sp)
library(leaflet)
circleFun <- function(center = c(0,0),diameter = 1, npoints = 100){
  r = diameter / 2
  tt <- seq(0,2*pi,length.out = npoints)
  xx <- center[1] + r * cos(tt)
  yy <- center[2] + r * sin(tt)
  Sr1 = Polygon(cbind(xx, yy))
  Srs1 = Polygons(list(Sr1), "s1")
  SpP = SpatialPolygons(list(Srs1), 1:1)
  return(SpP)
}
Circle.Town <- circleFun(c(1,-1),2.3,npoints = 100)

df1 <- data.frame(long=c(0.6,1,1.4), lat=c(-2, -.8, -0.2), other=c('a', 'b', 'c'), VAM=c(10,8,6), 
                  type=c('Public', 'Public', 'Private'), id=c(1:3)) %>% 
  mutate(X=paste0('<strong>id: </strong>', 
                  id,
                  '<br><strong>type</strong>: ',
                  type,
                  '<br><strong>VAM</strong>: ',
                  VAM))

# Create a continuous palette function
pal <- colorNumeric(
  palette = "RdYlBu",
  domain = df1$VAM
)

leaflet(height = "400px") %>% 
  addTiles() %>%
  addPolygons(data = Circle.Town, color = 'green',  fillOpacity = .7) %>%
  addCircleMarkers(data = df1, lat = ~lat, lng =~long, 
                   radius = ~VAM, popup = ~as.character(X), 
                   fillColor = ~pal(VAM),
                   stroke = FALSE, fillOpacity = 0.8,
                   clusterOptions = markerClusterOptions()) %>% 
  addLegend(position = "topright",
            pal = pal, values = df1$VAM,
            title = "VAM",
            opacity = 1
  ) %>% 
  setView(lng = 1, lat = -1, zoom = 8)

现在，当我点击其中一个圆圈时，我会弹出一个弹出窗口。当我将鼠标悬停而不是点击时，是否可以获取信息？理想情况下，我想要this。

谢谢！

Answer 1

这可能已被添加到传单包中，因为这个问题是在一年前提出的，但这可以通过label参数来完成。我使用的是传单R包1.1.0版。

如上所述读取数据：

library(sp)
library(leaflet)
library(dplyr)

circleFun <- function(center = c(0,0),diameter = 1, npoints = 100){
  r = diameter / 2
  tt <- seq(0,2*pi,length.out = npoints)
  xx <- center[1] + r * cos(tt)
  yy <- center[2] + r * sin(tt)
  Sr1 = Polygon(cbind(xx, yy))
  Srs1 = Polygons(list(Sr1), "s1")
  SpP = SpatialPolygons(list(Srs1), 1:1)
  return(SpP)
}
Circle.Town <- circleFun(c(1,-1),2.3,npoints = 100)

df1 <- data.frame(long=c(0.6,1,1.4), lat=c(-2, -.8, -0.2), other=c('a', 'b', 'c'), VAM=c(10,8,6), 
  type=c('Public', 'Public', 'Private'), id=c(1:3)) %>% 
  mutate(X=paste0('<strong>id: </strong>', 
    id,
    '<br><strong>type</strong>: ',
    type,
    '<br><strong>VAM</strong>: ',
    VAM))

# Create a continuous palette function
pal <- colorNumeric(
  palette = "RdYlBu",
  domain = df1$VAM
)

但是创建一个标签列表而不是vector：

labs <- as.list(df1$X)

然后在lapply参数中HTML label函数放在该列表上。请注意使用label代替popup。

library(htmltools)
leaflet(height = "400px") %>% 
  addTiles() %>%
  addPolygons(data = Circle.Town, color = 'green',  fillOpacity = .7) %>%
  addCircleMarkers(data = df1, lat = ~lat, lng =~long, 
    radius = ~VAM, label = lapply(labs, HTML), 
    fillColor = ~pal(VAM),
    stroke = FALSE, fillOpacity = 0.8,
    clusterOptions = markerClusterOptions()) %>% 
  addLegend(position = "topright",
    pal = pal, values = df1$VAM,
    title = "VAM",
    opacity = 1
  ) %>% 
  setView(lng = 1, lat = -1, zoom = 8)

在这个SO问题的答案中描述了这种方法：R and Leaflet: How to arrange label text across multiple lines

传单文档中的标签中有更多关于HTML的信息： https://rstudio.github.io/leaflet/popups.html

Answer 2

这是另一种选择：

library(leaflet)
library(htmltools)
library(htmlwidgets)

yourmap <- leaflet(height = "400px") %>% 
  addTiles() %>%
  addPolygons(data = Circle.Town, color = 'green',  fillOpacity = .7) %>%
  addCircleMarkers(data = df1, lat = ~lat, lng =~long, 
                   radius = ~VAM, popup = ~as.character(X), 
                   fillColor = ~pal(VAM),
                   stroke = FALSE, fillOpacity = 0.8,
                   clusterOptions = markerClusterOptions()) %>% 
  addLegend(position = "topright",
            pal = pal, values = df1$VAM,
            title = "VAM",
            opacity = 1
  ) %>% 
  setView(lng = 1, lat = -1, zoom = 8)

setwd("~/Desktop/")
saveWidget(yourmap, file="yourmap.html")

在桌面上，您将在地图下保存html和文件夹。打开位于/pathTo/yourmap_files/leaflet-binding-1.0.1.9002中的leaflet.js文件。在leaflet.js中，向下滚动到var popup = df.get(i, 'popup'); 并粘贴在下面：

          marker.on('mouseover', function (e) {
    this.openPopup();
});
marker.on('mouseout', function (e) {
    this.closePopup();
});

保存并重新打开yourmap.html文件。徘徊在你的一个观点!!

在R中用传单悬停时弹出？

2 个答案: