在echart4r.maps

如何解决在echart4r.maps

我正在使用R echart4r.maps包制作新西兰（NZ）地图。我设法修改了NZ地区的工具提示，但现在我正努力为地图上的标记添加单独的工具提示。我对javascript的了解非常少，因此非常感谢一些提示/帮助。

可复制的代码：

library(echarts4r)
library(shiny)
library(shinydashboard)
library(purrr)
library(dplyr)

data_by_region <- data.frame(
  Name = LETTERS[1:8],Region = c("Auckland","Bay of Plenty","Canterbury","Gisborne","Hawke's Bay","Manawatu-Wanganui","Marlborough","Nelson"),long = c(167.7994,170.1401,170.4842,171.607,172.8973,173.283966,173.666664,174.0602),lat = c(-45.9028,-45.6166,-43.5883,-41.8833298,-41.7573,-41.288,-41.270634,-40.7549),Oranges = c(227,252,373,363,287,307,308,293)
)

# Remove Chatham Island for echarts4r maps 
nz_file <- system.file("New_Zealand.json",package = "echarts4r.maps") 
nz_json <- jsonlite::read_json(nz_file)


# get names of polygons
names <- nz_json$features %>% 
  map("properties") %>% 
  map("name") %>% 
  unlist()

island_index <- grep("Chatham",names)

nz_json$features[[island_index]] <- NULL


ui <- dashboardPage(
  dashboardHeader(),dashboardSidebar(),dashboardBody(
    fluidRow(column(6,echarts4rOutput(outputId = "myMap1")
    ))
  )
)

server = function(input,output,session) {
   
    output$myMap1 <- renderEcharts4r({
      data_by_region$Region <- factor(data_by_region$Region)
      
      e_common(font_family = "monospace")
      
      map <- data_by_region %>%
        e_charts(Region) %>%
        e_map_register("NZ",nz_json) %>%
        e_map(Oranges,map = "NZ") %>%
        e_visual_map(
          Oranges,top = "20%",left = "0%",inRange = list(color = c("hotpink","#3366FF","#6699FF","#66CCFF","#33CCFF")),type = "piecewise",splitList = list(
            list(min = 300),list(min = 250,max = 300),list(min = 100,max = 250),list(value = 1,label = "None"),list(value = 0,label = "Top 5")
          ),formatter = htmlwidgets::JS("function(value,index,values){
                if(index == 'Infinity'){
                return ' > ' + value.toLocaleString()
                }else if (value != 0){
                return value.toLocaleString() + ' - ' + index.toLocaleString()
                }else{
                return value.toLocaleString()
                }
            }")) %>%
        e_tooltip(formatter = htmlwidgets::JS("
                         function(params){
                        return('<strong>' + params.name +
                     '</strong><br />Total: ' +  echarts.format.addCommas(params.value)) + ' oranges'}"))
      newdata <- data_by_region %>% top_n(5)
      
      for(i in 1:nrow(newdata)){
        data <- list(value = newdata$Name[i],coord = c(newdata$long[i],newdata$lat[i]))
        map <- map %>% e_mark_point(data = data,symbolSize = c(40,40),label = list(fontSize = 10,color = "black",fontWeight = "bolder"),itemStyle = list(
                                      color = "hotpink",borderColor = "hotpink"
                                    ))
        
      }
      
      map
    })
    
}

shinyApp(ui,server)

示例屏幕截图

在标记的工具提示中，我想包括以下内容：“姓氏：橙子的数量”。例如：“ 家庭A：15个橙子”。我不确定如何在标记工具提示中添加橘子的数量，因为我不知道在javascript函数中该怎么称呼。

我的尝试：

    e_tooltip(formatter = htmlwidgets::JS('
      function(params) {
        if(params.value) {
          return("Family " + params.value + " oranges")
        } else {
          return("");
        }
      }
    '))

谢谢。