[SOLVED] Multiple series radar plot with highcharter

Multiple series radar plot with highcharter

I am trying to create a radar plot with multiple series. Unfortunately I don't manage to make the polar = TRUE argument work. Here is my attempt so far :

library(dplyr)
library(highcharter)

df <- data.frame(Series = rep(paste0("Serie", 1:4), 2),
                 Product = c(rep("Product1", 4), rep("Product2", 4)),
                 Value = c(5.8, 6.3, 8.1, 2.3, 4.4, 4.6, 7.7, 6.6))

df %>% 
  hchart(type = "line", polar = TRUE, 
         hcaes(y = Value, group = Product), pointPlacement = "on") %>%
  hc_xAxis(categories = df %>% pull(Series) %>% unique()) %>% 
  hc_yAxis(gridLineInterpolation = "polygon",
           lineWidth = 0,
           min = 0)

Solution

I am creating the polar chart first and then add each series in a for-loop.

hc <- highchart() %>%
  hc_chart(polar = TRUE, type = "line") %>%
  hc_xAxis(categories = unique(df$Series),
           tickmarkPlacement = "on",
           lineWidth = 0) %>%
  hc_yAxis(gridLineInterpolation = "polygon",
           lineWidth = 0,
           min = 0) %>%
  hc_plotOptions(line = list(pointPlacement = "on"))

for(product in unique(df$Product)) {
  product_data <- df %>% filter(Product == product)
  hc <- hc %>% hc_add_series(
    name = product,
    data = product_data$Value,
    type = "line"
  )
}

hc

^{Created on 2025-07-21 with reprex v2.1.1}