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Added Axes.tricontourf Datetime Test#27487

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EthanZheng11 wants to merge 5 commits intomatplotlib:mainfrom
EthanZheng11:tricontourf
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Added Axes.tricontourf Datetime Test#27487
EthanZheng11 wants to merge 5 commits intomatplotlib:mainfrom
EthanZheng11:tricontourf

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@EthanZheng11 EthanZheng11 commented Dec 9, 2023

PR summary

Added code to test_datetime.py in order to test Axes.tricontourf as requested in #26864
Based on my testing, it seems that the tricontourf function does not support the datetime type, therefore I had to first convert it using date2num() to plot it correctly.

I'm new to this repository and GitHub open source contributions in general, I would appreciate if you provide feedback or if you have any suggestions on how I should proceed.

The outputted graph is as follows:

image

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Thank you for finding this.

It is actually the the goal of doing this exercise to find the places where we think we should support unitful behavior but do not.

It appears that actually current main does not error but also doesn't behave correctly either when handed (at least numpy datetime64 arrays) datetimes. I've opened #27499 to track this problem (along with the other tri* methods)

I will block merging this until the underlying problems are addressed.

@melissawm melissawm moved this to Needs decision in First Time Contributors Mar 6, 2026
@melissawm melissawm added the status: autoclose candidate PRs that are not yet ready for review and may be automatically closed in two weeks label Mar 26, 2026
@melissawm melissawm moved this from Needs decision to Waiting for author in First Time Contributors Mar 26, 2026
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⏰ This pull request might be automatically closed in two weeks from now.

Thank you for your contribution to Matplotlib and for the effort you have put into this PR. This pull request does not yet meet the quality and clarity standards needed for an effective review. Project maintainers have limited time for code reviews, and our goal is to prioritize well-prepared contributions to keep Matplotlib maintainable.

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