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New animation example (Joy Division's Unchained Love cover) #3099
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Original file line number | Diff line number | Diff line change |
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""" | ||
Comparative path demonstration of frequency from a fake signal of a pulsar. | ||
(mostly known because of the cover for Joy Division's Unknown Pleasures) | ||
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Author: Nicolas P. Rougier | ||
""" | ||
import numpy as np | ||
import matplotlib.pyplot as plt | ||
import matplotlib.animation as animation | ||
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# Create new Figure with black background | ||
fig = plt.figure(figsize=(8, 8), facecolor='black') | ||
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# Add a subplot with no frame | ||
ax = plt.subplot(111, frameon=False) | ||
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# Generate random data | ||
data = np.random.uniform(0, 1, (64, 75)) | ||
X = np.linspace(-1, 1, data.shape[-1]) | ||
G = 1.5 * np.exp(-4 * X * X) | ||
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# Generate line plots | ||
lines = [] | ||
for i in range(len(data)): | ||
# Small reduction of the X extents to get a cheap perspective effect | ||
xscale = 1 - i / 200. | ||
# Same for linewidth (thicker strokes on bottom) | ||
lw = 1.5 - i / 100.0 | ||
line, = ax.plot(xscale * X, i + G * data[i], color="w", lw=lw) | ||
lines.append(line) | ||
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# Set y limit (or first line is cropped because of thickness) | ||
ax.set_ylim(-1, 70) | ||
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# No ticks | ||
ax.set_xticks([]) | ||
ax.set_yticks([]) | ||
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# 2 part titles to get different font weights | ||
ax.text(0.5, 1.0, "MATPLOTLIB ", transform=ax.transAxes, | ||
ha="right", va="bottom", color="w", | ||
family="sans-serif", fontweight="light", fontsize=16) | ||
ax.text(0.5, 1.0, "UNCHAINED", transform=ax.transAxes, | ||
ha="left", va="bottom", color="w", | ||
family="sans-serif", fontweight="bold", fontsize=16) | ||
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# Update function | ||
def update(*args): | ||
# Shift all data to the right | ||
data[:, 1:] = data[:, :-1] | ||
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# Fill-in new values | ||
data[:, 0] = np.random.uniform(0, 1, len(data)) | ||
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# Update data | ||
for i in range(len(data)): | ||
lines[i].set_ydata(i + G * data[i]) | ||
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# Return modified artists | ||
return lines | ||
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# Construct the animation, using the update function as the animation | ||
# director. | ||
anim = animation.FuncAnimation(fig, update, interval=10) | ||
plt.show() |
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sorry, one last thing, update should return the artists changed. This is mostly to make blitting work.
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Which one (there are 256 of them) ?
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The list of all of them (
lines
).There was a problem hiding this comment.
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done.