Enhance Sunburst chart via allowing specifying itemStyle by each slice about echarts4r HOT 8 CLOSED

cool thanks. I'll continue to post code chunks where I see maybe useful, you can take a look when you're available.

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@JohnCoene could you take a look at your example code again? Latest version is breaking your example.

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I think it would be really useful to include the example of using itemStyle= in the help section for this function. It is hard to discern what the desired format should be, and the error message itself is not very informative.

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Hi Shows,

Thank you for the suggesting. I have implemented it, the only issue being that itemStyle is not applied to parent and only to child. itemStyle is an array in the original library which means we need to pass a list of data.frames or a list of lists.

It is imperfect but may work in future version. I plan on focusing more on echarts4r around October once work quiets down, I'll tackle this issue (amongst many others).

example

df <- data.frame(
  parent = c("earth", "earth", "earth", "mars", "mars"), 
  child = c("forest", "ocean", "iceberg", "elon", "curiosity"),
  value = ceiling(rnorm(5, 10, 2))
)

# add styles
df$color <- "red"
df$borderColor <- "black"

df %>% 
  tidyr::nest(color, borderColor, .key = "style") %>% # nest
  e_charts() %>% 
  e_sunburst(parent, child, value, style) 

Let me know what you think.

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Thank you! Feel free to make a PR.

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Hi Shows, I must thank you for sticking to the package despite all its bugs! I just pushed a fix. Thanks for reporting that :)

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By the way, I also pushed some great performances improvements (in the rendered data.frame) by greatly lightening the output, I hope you see a difference.

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Thanks for pointing that out, I added details as well as an example to the e_sunburst man page (dev version of course).

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