If there is a way to add labels to groups of ticks

[morozovkirill]

For example, I have a barchart and I want to label some groups of bars. And groups might contain different amount of bars. Any ideas, how can I solve this issue?

Similar issue with d3 - https://stackoverflow.com/questions/37812922/grouped-category-bar-chart-with-different-groups-in-d3

[Fil]

Note: I've migrated this question to the discussion board.

I don't think there is an easy answer in Plot for this task.