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Remove contour warning for "no-valid-levels". by anntzer · Pull Request #24912 · matplotlib/matplotlib · GitHub

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Remove contour warning for "no-valid-levels". - #24912

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oscargus merged 1 commit into
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anntzer:cw
Jan 12, 2023
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Remove contour warning for "no-valid-levels".#24912
oscargus merged 1 commit into
matplotlib:mainfrom
anntzer:cw

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anntzer commented Jan 9, 2023

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If the user explicitly passes a levels array (the default is auto-determined), let's assume that they know what they are doing. Closes #23778.

(I could consider keeping the warning for now in the case where the user didn't pass levels but z is uniform throughout, as that's more likely to be a "data-exploration" case.)

PR Summary

PR Checklist

Documentation and Tests

  • Has pytest style unit tests (and pytest passes)
  • Documentation is sphinx and numpydoc compliant (the docs should build without error).
  • New plotting related features are documented with examples.

Release Notes

  • New features are marked with a .. versionadded:: directive in the docstring and documented in doc/users/next_whats_new/
  • API changes are marked with a .. versionchanged:: directive in the docstring and documented in doc/api/next_api_changes/
  • Release notes conform with instructions in next_whats_new/README.rst or next_api_changes/README.rst

Remove contour warning for "no-valid-levels".
fd6604d 
If the user explicitly passes a levels array (the default is
auto-determined), let's assume that they know what they are doing.

rcomer commented Jan 9, 2023

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This also closes #20203.

rcomer linked an issue Jan 9, 2023 that may be closed by this pull request
contour edge case with all data below levels and a surrounding field of zeros #20203
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oscargus commented Jan 9, 2023

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Is this comment from @ianthomas23 dealt with?

"We should probably add a check for no levels specified by the user for a contour call, as already happens for contourf."

anntzer commented Jan 9, 2023

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I'm not sure what this really means, but if it's adding a check for levels=[], I'd say that's again something explicitly asked by the user and we should not warn (just like we don't warn for plot([], [])).

ianthomas23 commented Jan 9, 2023

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My comment meant that if there is an explicit check for user-specified levels for a contourf call, there should be a similar check for a contour call so that the checks are consistent. But as you are removing the contourf check then that makes them consistent too, as neither checks.

tacaswell modified the milestones: v3.9.0, v3.8.0 Jan 9, 2023
oscargus approved these changes Jan 10, 2023
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

I see the point of:

(I could consider keeping the warning for now in the case where the user didn't pass levels but z is uniform throughout, as that's more likely to be a "data-exploration" case.)

but do not have strong opinions enough to claim that it should be there. Seems like a quite safe option though.

anntzer commented Jan 10, 2023

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Let's see what others think here.

tacaswell approved these changes Jan 11, 2023
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

I'm in favor of removing this warning and if we get reports of "all constant and no lines" we can consider putting the warning back in the fully automatic case (and it would make sense to check on the "all constant" case explicitly).

anntzer commented Jan 11, 2023

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Sounds good; this is good to go, then?

oscargus modified the milestones: v3.8.0, v3.7.0 Jan 12, 2023

oscargus commented Jan 12, 2023

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Let's get this in for 3.7.

oscargus merged commit 018c5ef into matplotlib:main Jan 12, 2023
meeseeksmachine mentioned this pull request Jan 12, 2023
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meeseeksmachine pushed a commit to meeseeksmachine/matplotlib that referenced this pull request Jan 12, 2023
Backport PR matplotlib#24912: Remove contour warning for "no-valid-le…
9dd1223 
…vels".
anntzer deleted the cw branch January 12, 2023 23:07
oscargus added a commit that referenced this pull request Jan 12, 2023
Merge pull request #24963 from meeseeksmachine/auto-backport-of-pr-24…
01a4e9f 
…912-on-v3.7.x

Backport PR #24912 on branch v3.7.x (Remove contour warning for "no-valid-levels".)
rcomer mentioned this pull request Jan 22, 2023
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ksunden mentioned this pull request Feb 20, 2023
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greglucas mentioned this pull request Mar 9, 2023
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rcomer mentioned this pull request Mar 8, 2024
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[ENH]: Allow override of contour level autoscaling contour edge case with all data below levels and a surrounding field of zeros

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