Question

我需要根据它们的类型在Shiny传单地图点上进行映射 - 总共四种类型，使用相同的不同颜色的标记。

我查了一下：

https://rstudio.github.io/leaflet/markers.html

这看起来像我的回复，但我无法解决它:( Change color of leaflet marker

此代码在答案中分享

library(dplyr)
library(leaflet)

mutate(quakes, group = cut(mag, breaks = c(0, 5, 6, Inf), labels = c("blue", 
"green", "orange"))) -> mydf

### I edit this png file and created my own marker.
### https://raw.githubusercontent.com/lvoogdt/Leaflet.awesome-
markers/master/dist/images/markers-soft.png
quakeIcons <- iconList(blue = makeIcon("/Users/jazzurro/Documents/Stack 
Overflow/blue.png", iconWidth = 24, iconHeight =32),
                   green = makeIcon("/Users/jazzurro/Documents/Stack 
Overflow/green.png", iconWidth = 24, iconHeight =32),
                   orange = makeIcon("/Users/jazzurro/Documents/Stack 
Overflow/orange.png", iconWidth = 24, iconHeight =32))


leaflet(data = mydf[1:100,]) %>% 
addTiles() %>%
addMarkers(icon = ~quakeIcons[group])

我基本上有相同的代码

# Create our own custom icons
teamIcons <- iconList(
A = makeIcon("C:/Map/Asset 20.png", iconWidth = 18, iconHeight = 18),
B = makeIcon("C:/Map/Asset 21.png", iconWidth = 18, iconHeight = 18),
C = makeIcon("C:/Map/Asset 22.png", iconWidth = 18, iconHeight = 18),
D = makeIcon("C:/Map/Asset 23.png", iconWidth = 18, iconHeight = 18))

data1＆lt; - data％＆gt;％mutate（type = factor（data $ type），c（“A”，“B”，“C”，“D”））

然后我就这样做了

m <- leaflet(data=data) %>%
addProviderTiles(providers$Stamen.TonerLite) %>%
addMarkers(~data1$long, ~data1$lat, icon = ~teamIcons[data1$type], popup 
state_popup)

addMarkers的数据来自另一个数据集 - data1，而不是数据。当我使用真棒图标时，它不会产生问题。当我在目录中使用自己的图标时，我在地图上有一个普通的蓝色标记。

无效的下标类型'logical'

Answer 1

answer的Oleksiy，帮了我很多忙。

但是我在mutate函数中发现了两个错误，它错过了要转换的datafame的名称，并且在创建data2时，我猜该因子函数必须与data2数据帧一起使用。 / p>

所以

mutate(data2,type=factor(data2$project_id),c("project1","project2"))

而不是

mutate(type=factor(data$project_id),c("project1","project2")`.

Answer 2

亲自解决。

library(leaflet)
library(dplyr)

每个图标都是个人自定义的，并被放入工作目录。

然后使用icon_list（）

# Create our own custom icons
icon_list <- iconList(
project1 = makeIcon("C:/Map/1.png", iconWidth = 24, iconHeight = 30),
project2 = makeIcon("C:/Map/2.png", iconWidth = 24, iconHeight = 30)

和你一样多

project1，project2等当然在数据集列中匹配相同的名称，在数据集中每个项目应该有long和lat。

然后

data2 <- data %>% mutate(type = factor(data$project_id), c("project1", 
"project2")

在服务器中，简单的代码将是这样的

m <-  leaflet(data=data) %>% 
  addProviderTiles(providers$Stamen.TonerLite) %>%
  addMarkers(~data2$long, ~data2$lat, icon=~icon_list[data2$project_id], 
  popup = state_popup)

感谢this question

闪亮的传单地图上的自定义标记

2 个答案: