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59 lines
1.3 KiB
Markdown
59 lines
1.3 KiB
Markdown
# 衰变
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这个例子展示了：
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- 使用生成器来驱动动画，
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- 在动画期间更改轴限制。
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```python
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import numpy as np
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import matplotlib.pyplot as plt
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import matplotlib.animation as animation
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def data_gen(t=0):
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cnt = 0
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while cnt < 1000:
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cnt += 1
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t += 0.1
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yield t, np.sin(2*np.pi*t) * np.exp(-t/10.)
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def init():
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ax.set_ylim(-1.1, 1.1)
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ax.set_xlim(0, 10)
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del xdata[:]
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del ydata[:]
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line.set_data(xdata, ydata)
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return line,
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fig, ax = plt.subplots()
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line, = ax.plot([], [], lw=2)
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ax.grid()
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xdata, ydata = [], []
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def run(data):
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# update the data
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t, y = data
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xdata.append(t)
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ydata.append(y)
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xmin, xmax = ax.get_xlim()
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if t >= xmax:
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ax.set_xlim(xmin, 2*xmax)
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ax.figure.canvas.draw()
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line.set_data(xdata, ydata)
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return line,
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ani = animation.FuncAnimation(fig, run, data_gen, blit=False, interval=10,
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repeat=False, init_func=init)
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plt.show()
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```
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## 下载这个示例
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- [下载python源码: animate_decay.py](https://matplotlib.org/_downloads/animate_decay.py)
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- [下载Jupyter notebook: animate_decay.ipynb](https://matplotlib.org/_downloads/animate_decay.ipynb) |