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DOC: fix autoscale docstring #18671

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Merged
merged 2 commits into from
Oct 11, 2020
Merged

DOC: fix autoscale docstring #18671

merged 2 commits into from
Oct 11, 2020

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jklymak
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@jklymak jklymak commented Oct 6, 2020

PR Summary

The previous versions made it sound like this would be applied per plot command, whereas the autoscale_on really is applied at draw time.

Closes #18662

PR Checklist

  • Has pytest style unit tests (and pytest passes).
  • Is Flake 8 compliant (run flake8 on changed files to check).
  • New features are documented, with examples if plot related.
  • Documentation is sphinx and numpydoc compliant (the docs should build without error).
  • Conforms to Matplotlib style conventions (install flake8-docstrings and pydocstyle<4 and run flake8 --docstring-convention=all).
  • New features have an entry in doc/users/next_whats_new/ (follow instructions in README.rst there).
  • API changes documented in doc/api/next_api_changes/ (follow instructions in README.rst there).

@jklymak jklymak added this to the v3.4.0 milestone Oct 6, 2020
@jklymak jklymak mentioned this pull request Oct 6, 2020
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jklymak commented Oct 6, 2020

Render: https://47103-1385122-gh.circle-artifacts.com/0/doc/build/html/api/_as_gen/matplotlib.axes.Axes.set_autoscale_on.html#matplotlib.axes.Axes.set_autoscale_on

@QuLogic
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QuLogic commented Oct 6, 2020

This only changed because it was made lazy; maybe we want it to re-scale when disabling it?

@jklymak
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jklymak commented Oct 6, 2020

Oh, hmmm. If we do:

import matplotlib.pyplot as plt
import numpy as np

fig, axes = plt.subplots(2, 1, sharex=True)

for i in range(2):
    ax = axes[i]
    ax.plot(np.random.randn(1000), lw=1)
    #fig.canvas.draw()
    l, = ax.plot([500, 500], ax.get_ylim(), 'k')
    # ax.autoscale_view()
    ax.set_autoscaley_on(False)

ax.set_ylim(-3, 3)
plt.show()

Then the limits are correct. So I think get_ylim calls the autolim machinery.

I don't think that we want to have set_autoscale_on do anything other than tell `auto

@timhoffm timhoffm merged commit 7ce2f67 into matplotlib:master Oct 11, 2020
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@dopplershift @jklymak If you think that there is an issue with the auto scaling behavior, please open a separate issue\PR. I've merged this as a doc improvement.

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@dopplershift dopplershift dopplershift approved these changes

@timhoffm timhoffm timhoffm approved these changes

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Inconsistent setting of axis limits with autoscale=False
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@jklymak @QuLogic @timhoffm @dopplershift