衰变

这个例子展示了：

  • 使用生成器来驱动动画，
  • 在动画期间更改轴限制。

衰变示例

  1. import numpy as np
  2. import matplotlib.pyplot as plt
  3. import matplotlib.animation as animation
  6. def data_gen(t=0):
  7.     cnt = 0
  8.     while cnt < 1000:
  9.         cnt += 1
  10.         t += 0.1
  11.         yield t, np.sin(2*np.pi*t) * np.exp(-t/10.)
  14. def init():
  15.     ax.set_ylim(-1.1, 1.1)
  16.     ax.set_xlim(0, 10)
  17.     del xdata[:]
  18.     del ydata[:]
  19.     line.set_data(xdata, ydata)
  20.     return line,
  22. fig, ax = plt.subplots()
  23. line, = ax.plot([], [], lw=2)
  24. ax.grid()
  25. xdata, ydata = [], []
  28. def run(data):
  29.     # update the data
  30.     t, y = data
  31.     xdata.append(t)
  32.     ydata.append(y)
  33.     xmin, xmax = ax.get_xlim()
  35.     if t >= xmax:
  36.         ax.set_xlim(xmin, 2*xmax)
  37.         ax.figure.canvas.draw()
  38.     line.set_data(xdata, ydata)
  40.     return line,
  42. ani = animation.FuncAnimation(fig, run, data_gen, blit=False, interval=10,
  43.                               repeat=False, init_func=init)
  44. plt.show()

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