|
| 1 | +""" |
| 2 | +======================= |
| 3 | +Multiple axes animation |
| 4 | +======================= |
| 5 | +
|
| 6 | +This example showcases: |
| 7 | +
|
| 8 | + how animation on subplots works, |
| 9 | +
|
| 10 | + using a figure artist in the animation. |
| 11 | +
|
| 12 | +""" |
| 13 | + |
| 14 | +import numpy as np |
| 15 | +import matplotlib.pyplot as plt |
| 16 | +import matplotlib.animation as animation |
| 17 | +from matplotlib.patches import ConnectionPatch |
| 18 | + |
| 19 | +fig, (axl, axr) = plt.subplots( |
| 20 | + ncols=2, |
| 21 | + sharey=True, |
| 22 | + figsize=(6, 2), |
| 23 | + gridspec_kw=dict(width_ratios=[1, 3], wspace=0), |
| 24 | +) |
| 25 | +axl.set_aspect(1) |
| 26 | +axr.set_box_aspect(1 / 3) |
| 27 | +axr.yaxis.set_visible(False) |
| 28 | +axr.xaxis.set_ticks([0, np.pi, 2 * np.pi], ["0", r"$\pi$", r"$2\pi$"]) |
| 29 | + |
| 30 | +# draw circle with initial point in left Axes |
| 31 | +x = np.linspace(0, 2 * np.pi, 50) |
| 32 | +axl.plot(np.cos(x), np.sin(x), "k", lw=0.3) |
| 33 | +(point,) = axl.plot(0, 0, "o") |
| 34 | + |
| 35 | +# draw full curve to set view limits in right Axes |
| 36 | +(sine,) = axr.plot(x, np.sin(x)) |
| 37 | + |
| 38 | +# draw connecting line between both graphs |
| 39 | +con = ConnectionPatch( |
| 40 | + (1, 0), |
| 41 | + (0, 0), |
| 42 | + "data", |
| 43 | + "data", |
| 44 | + axesA=axl, |
| 45 | + axesB=axr, |
| 46 | + color="C0", |
| 47 | + ls="dotted", |
| 48 | +) |
| 49 | +# in order to use blitting, con needs to be added to an Axes (not fig) |
| 50 | +fig.add_artist(con) |
| 51 | + |
| 52 | + |
| 53 | +def animate(i): |
| 54 | + pos = np.cos(i), np.sin(i) |
| 55 | + point.set_data(*pos) |
| 56 | + x = np.linspace(0, i, int(i * 25 / np.pi)) |
| 57 | + sine.set_data(x, np.sin(x)) |
| 58 | + con.xy1 = pos |
| 59 | + con.xy2 = i, pos[1] |
| 60 | + return point, sine, con |
| 61 | + |
| 62 | + |
| 63 | +ani = animation.FuncAnimation( |
| 64 | + fig, |
| 65 | + animate, |
| 66 | + interval=50, |
| 67 | + blit=False, # blitting can't be used with Figure artists |
| 68 | + frames=x, |
| 69 | + repeat_delay=100, |
| 70 | +) |
| 71 | + |
| 72 | +plt.show() |
| 73 | + |
| 74 | +############################################################################# |
| 75 | +# |
| 76 | +# .. admonition:: References |
| 77 | +# |
| 78 | +# The use of the following functions, methods, classes and modules is shown |
| 79 | +# in this example: |
| 80 | +# |
| 81 | +# - `matplotlib.patches.ConnectionPatch` |
| 82 | +# - `matplotlib.animation.FuncAnimation` |
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