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"double-pendulum" example's speed not correct / varying #13267

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unedited-despair opened this issue Jan 23, 2019 · 1 comment
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"double-pendulum" example's speed not correct / varying #13267

unedited-despair opened this issue Jan 23, 2019 · 1 comment
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topic: animation
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v3.1.0

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@unedited-despair
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unedited-despair commented Jan 23, 2019 •
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Bug report

Bug summary

"matplotlib/examples/animation/double_pendulum_sgskip.py": The animation seems to be speed up by either factor 2 or factor 4 (mostly factor 4, the behaviour isn't consistent though). So per second, about 2 or 4 displayed "seconds" are passing in the animation window with the animation processing significantly faster as expected.

Code for reproduction

The example was not changed.

Matplotlib version

  • Operating system: Linux version 4.20.3-arch1-1-ARCH (builduser@heftig-25602) (gcc version 8.2.1 20181127 (GCC)) Fix autofmt_xdate() when using in conjunction with twinx() #1 SMP PREEMPT Wed Jan 16 22:38:58 UTC 2019

  • Matplotlib version: 3.0.2

  • Matplotlib backend: TkAgg

  • Python version: 3.7.2

  • Other libraries: Numpy: 1.16.0
    Scipy: 1.2.0

I installed Python from the Arch repositories. I installed matplotlib via pip.
@timhoffm timhoffm mentioned this issue Jan 23, 2019
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Thanks for the report. The intended time interval and the interval at which frames were displayed did not match. See #13271.

@QuLogic QuLogic added this to the v3.1 milestone Jan 23, 2019
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@QuLogic @timhoffm @dstansby @unedited-despair