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Wrong order for grouped bar chart sorting (descending) #4749
Description
https://codepen.io/oshikryu/pen/xxwxzwm
I'm trying to create a grouped bar chart where the order has the aggregate total of a category going in descending order.
Some notes explaining the chart:
- cloudy should be before rainy when descending
Is there something wrong with the data I have formatted? Or is this a bug with the sorting logic inside of plotly itself?
Activity
[-]Wrong order for grouped bar chart sorting (descending)[/-][+]Wrong order for bar chart sorting with null values[/+]oshikryu commentedon Apr 22, 2020
It appears the base case is boiled down to null values improperly being sorted
https://codepen.io/oshikryu/pen/MWaJgLx
alexcjohnson commentedon Apr 22, 2020
Nice detective work @oshikryu - that part is definitely a bug, we should probably do something like we do in
dash-tableand always sort null / invalid values at the end, regardless of sort order. I think though that your original use case can be solved without transforms, usingcategoryorder: 'total descending'https://plotly.com/javascript/reference/#layout-xaxis-categoryorder[-]Wrong order for bar chart sorting with null values[/-][+]Wrong order for grouped bar chart sorting (descending)[/+]oshikryu commentedon Apr 22, 2020
I will open up a separate issue for the simple case of non-grouped bar chart sorting with null values. The original case of grouped bar sorting still remains unresolved
oshikryu commentedon May 19, 2020
I've updated the example for a much simpler reproduction of the bug. I believe it's either malformed transform or something weird with sorting choosing the first
targetin a datasetoshikryu commentedon May 19, 2020
I believe this issue is related to #4711
emilykl commentedon Aug 27, 2026
Closing this issue because
transformswas removed from the API in #7240.