R Highcharter自定义图例以仅显示某些值

Question

我需要图例来显示候选名称及其颜色，其中间隔 == 3。 see plot here

子集停靠点 df (stops[my.cols$interval==3])) 适用于图例，但它也会更改地图上的颜色。我需要保持每个州的颜色相同，但我不想在图例中多次显示候选人的名字。

参见下面的 MWE：

library(highcharter)
library(usmap)
library(dplyr)

df <- usmap::statepop
df$interval <- sample(c(1,2,3), nrow(df), replace = T)
df$scaled <- sample(1:18, nrow(df), replace = T)

us_small <- download_map_data("countries/us/custom/us-small")


my.cols <- data.frame(
  interval = c(3,2,1),
  scaled = 1:18,
  ContractName = c(rep("Klobuchar",3),rep("Buttigieg",3),rep("Bloomberg",3),rep("Biden",3),rep("Sanders",3),rep("Warren",3)),
  hexes = c(  # GRAY: [
    '#dddddd',
    '#bbbbbb',
    '#888888',
    # PURPLE: [
    '#e8bbdc',
    '#b577a5' ,
    '#7c466e' ,
    # GREEN: [
    '#bbe8ae',
    '#88b57a',
    '#4e7641',
    # BLUE: [
    '#b5cacf',
    '#81b5c0',
    '#578b96' ,
    # RED: [
    '#f9adad',
    '#cf0000',
    '#9f0000',
    # more gray
    "#000000",
    "#696969",
    "#808080"
  ))

stops <- data.frame(
  name = my.cols$ContractName,
  scaled = 1:18,
  from = 0:17/17,
  color = toupper(my.cols$hexes),
  stringsAsFactors = FALSE)

df <- merge(df, stops, by = "scaled")

stops <- list_parse(stops) 




highchart() %>% 
  hc_add_series_map(us_small, df,
                    value = "from", joinBy = c("woe-name", "full"),
                    borderColor = "darkgrey"
                    ,dataLabels = list(enabled = TRUE
                                       ,format = "{point.properties.hc-a2}")) %>% 
  # hc_colorAxis(dataClasses = stops[my.cols$interval==3]) %>%
  hc_colorAxis(dataClasses = stops) %>%
  hc_legend(align = 'right') %>%
  hc_mapNavigation(enabled = FALSE)

hc_plotOptions 中是否有可以帮助自定义图例的内容？

此解决方案将图例中重复的名称变灰，但仍会显示它们：

Answer 1

我可以设置种子：

set.seed(111)
df <- usmap::statepop
df$interval <- sample(c(1,2,3), nrow(df), replace = T)
df$scaled <- sample(1:18, nrow(df), replace = T)

你的子集是根据data.framemy.cols停止的吗？在它看起来像这样之前：

希望我没看错，因为你不太清楚要显示哪些图例：

highchart() %>% 
  hc_add_series_map(us_small, df,
                    value = "from", joinBy = c("woe-name", "full"),
                    borderColor = "darkgrey",
                    dataLabels = list(enabled = TRUE
                                       ,format = "{point.properties.hc-a2}")) %>% 
  hc_colorAxis(dataClasses = stops[my.cols$interval==3]) %>%
  hc_legend(align = 'right') %>%
  hc_mapNavigation(enabled = FALSE)

这些是我会话中用来运行这个的包：

R version 3.6.1 (2019-07-05)

[...]

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] dplyr_0.8.3       usmap_0.5.0       highcharter_0.7.0

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