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Cleanup animation examples#10125

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dstansby merged 2 commits intomatplotlib:masterfromanntzer:anim-examples
Jan 17, 2018
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61 changes: 18 additions & 43 deletionsdoc/api/animation_api.rst
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@@ -1,6 +1,6 @@
======================
``animation`` module
======================
*********
animation
*********

.. automodule:: matplotlib.animation
:no-members:
Expand All@@ -11,7 +11,6 @@
:local:
:backlinks: entry


Animation
=========

Expand All@@ -37,7 +36,6 @@ To save an animation to disk use `Animation.save` or `Animation.to_html5_video`
See :ref:`ani_writer_classes` below for details about what movie formats are
supported.


``FuncAnimation``
-----------------

Expand All@@ -48,7 +46,6 @@ The inner workings of `FuncAnimation` is more-or-less::
fig.canvas.draw_idle()
fig.canvas.start_event_loop(interval)


with details to handle 'blitting' (to dramatically improve the live
performance), to be non-blocking, not repeatedly start/stop the GUI
event loop, handle repeats, multiple animated axes, and easily save
Expand DownExpand Up@@ -122,54 +119,40 @@ artist at a global scope and let Python sort things out. For example ::
init_func=init, blit=True)
plt.show()


The second method is to us `functools.partial` to 'bind' artists to
function. A third method is to use closures to build up the required
artists and functions. A fourth method is to create a class.




Examples
~~~~~~~~

.. toctree::
:maxdepth: 1

../gallery/animation/animate_decay
../gallery/animation/bayes_update_sgskip
../gallery/animation/double_pendulum_animated_sgskip
../gallery/animation/dynamic_image
../gallery/animation/bayes_update
../gallery/animation/double_pendulum_sgskip
../gallery/animation/histogram
../gallery/animation/rain
../gallery/animation/random_data
../gallery/animation/simple_3danim
../gallery/animation/random_walk
../gallery/animation/simple_anim
../gallery/animation/strip_chart_demo
../gallery/animation/strip_chart
../gallery/animation/unchained

``ArtistAnimation``
-------------------


Examples
~~~~~~~~

.. toctree::
:maxdepth: 1

../gallery/animation/basic_example
../gallery/animation/basic_example_writer_sgskip
../gallery/animation/dynamic_image2



../gallery/animation/dynamic_image

Writer Classes
==============



The provided writers fall into two broad categories: pipe-based and
file-based. The pipe-based writers stream the captured frames over a
pipe to an external process. The pipe-based variants tend to be more
Expand All@@ -179,7 +162,6 @@ performant, but may not work on all systems.
:toctree: _as_gen
:nosignatures:


FFMpegWriter
ImageMagickFileWriter
AVConvWriter
Expand All@@ -196,7 +178,6 @@ slower, these writers can be easier to debug.
ImageMagickWriter
AVConvFileWriter


Fundamentally, a `MovieWriter` provides a way to grab sequential frames
from the same underlying `~matplotlib.figure.Figure` object. The base
class `MovieWriter` implements 3 methods and a context manager. The
Expand All@@ -215,45 +196,39 @@ file to disk. For example ::
moviewriter.grab_frame()
moviewriter.finish()


If using the writer classes directly (not through `Animation.save`), it is strongly encouraged
to use the `~MovieWriter.saving` context manager ::
If using the writer classes directly (not through `Animation.save`), it is
strongly encouraged to use the `~MovieWriter.saving` context manager ::

with moviewriter.saving(fig, 'myfile.mp4', dpi=100):
for j in range(n):
update_figure(n)
moviewriter.grab_frame()


to ensures that setup and cleanup are performed as necessary.

Examples
--------

:ref:`sphx_glr_gallery_animation_moviewriter_sgskip.py`
.. toctree::
:maxdepth: 1

../gallery/animation/frame_grabbing_sgskip

.. _ani_writer_classes:

Helper Classes
==============


Animation Base Classes
----------------------


.. autosummary::
:toctree: _as_gen
:nosignatures:

Animation
TimedAnimation


Custom Animation classes
------------------------

:ref:`sphx_glr_gallery_animation_subplots.py`

Writer Registry
---------------

Expand All@@ -280,7 +255,7 @@ To reduce code duplication base classes
MovieWriter
FileMovieWriter

and mixins are provided
and mixins

.. autosummary::
:toctree: _as_gen
Expand All@@ -290,9 +265,9 @@ and mixins are provided
FFMpegBase
ImageMagickBase

See the source code for how to easily implement new `MovieWriter`
classes.
are provided.

See the source code for how to easily implement new `MovieWriter` classes.

Inheritance Diagrams
====================
Expand Down
4 changes: 2 additions & 2 deletionsdoc/users/prev_whats_new/whats_new_1.1.rst
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Expand Up@@ -35,8 +35,8 @@ Ryan May has written a backend-independent framework for creating
animated figures. The :mod:`~matplotlib.animation` module is intended
to replace the backend-specific examples formerly in the
:ref:`examples-index` listings. Examples using the new framework are
in :ref:`animation-examples-index`; see the entrancing :ref:`double
pendulum <sphx_glr_gallery_animation_double_pendulum_animated_sgskip.py>` which uses
in :ref:`animation-examples-index`; see the entrancing :file:`double
pendulum <gallery/animation/double_pendulum_sgskip.py>` which uses
:meth:`matplotlib.animation.Animation.save` to create the movie below.

.. raw:: html
Expand Down
5 changes: 3 additions & 2 deletionsexamples/animation/animate_decay.py
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Expand Up@@ -3,10 +3,11 @@
Decay
=====

A sinusoidal decay animation.
This example showcases:
- using a generator to drive an animation,
- changing axes limits during an animation.
"""


import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
Expand Down
53 changes: 0 additions & 53 deletionsexamples/animation/basic_example.py
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54 changes: 0 additions & 54 deletionsexamples/animation/basic_example_writer_sgskip.py
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Expand Up@@ -9,13 +9,18 @@
distribution should converge.
"""

# update a distribution based on new data.
import math

import numpy as np
import matplotlib.pyplot as plt
import scipy.stats as ss
from matplotlib.animation import FuncAnimation


def beta_pdf(x, a, b):
return (x**(a-1) * (1-x)**(b-1) * math.gamma(a + b)
/ (math.gamma(a) * math.gamma(b)))


class UpdateDist(object):
def __init__(self, ax, prob=0.5):
self.success = 0
Expand DownExpand Up@@ -47,7 +52,7 @@ def __call__(self, i):
# Choose success based on exceed a threshold with a uniform pick
if np.random.rand(1,) < self.prob:
self.success += 1
y =ss.beta.pdf(self.x, self.success + 1, (i - self.success) + 1)
y =beta_pdf(self.x, self.success + 1, (i - self.success) + 1)
self.line.set_data(self.x, y)
return self.line,

Expand Down
Original file line numberDiff line numberDiff line change
Expand Up@@ -94,5 +94,4 @@ def animate(i):
ani = animation.FuncAnimation(fig, animate, np.arange(1, len(y)),
interval=25, blit=True, init_func=init)

# ani.save('double_pendulum.mp4', fps=15)
plt.show()
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