更新时间:2023-01-27 09:14:19
要绘制其属性沿其变化的线,请使用LineCollection.示例此处和此例子.
To plot a line whose properties change along it, use a LineCollection. Example here and here. To make an animation with a LineCollection, see this example.
要回答事物在上面的代码中的工作方式,请在animate()
中用line.set_data(x, y)
重置行x,y
属性.然后该函数将Matplotlib必须在每一帧更新的艺术家集合(line,)
返回给Matplotlib.
To answer how the thing works in the code above, within animate()
you are resetting the line x,y
properties with line.set_data(x, y)
. the function then returns to Matplotlib the set (line,)
of artists that matplotlib must update at each frame.
这就是我在寻找的内容(仅当您的平台在上次通话中支持blit=true
时才启用它):
Here's what I think you're looking for (enable blit=true
only if your platform supports it in the last call):
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
from matplotlib.collections import LineCollection
from matplotlib.colors import ListedColormap, BoundaryNorm
# First set up the figure, the axis, and the plot element we want to animate
fig = plt.figure()
ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
cmap = ListedColormap(['b', 'r', 'b'])
norm = BoundaryNorm([0, 1, 1.5, 2], cmap.N)
line = LineCollection([], cmap=cmap, norm=norm,lw=2)
line.set_array(np.linspace(0, 2, 1000))
ax.add_collection(line)
# initialization function: plot the background of each frame
def init():
line.set_segments([])
return line,
# animation function. This is called sequentially
def animate(i):
x = np.linspace(0, 2, 1000)
y = np.sin(2 * np.pi * (x - 0.01 * i))
points = np.array([x, y]).T.reshape(-1, 1, 2)
segments = np.concatenate([points[:-1], points[1:]], axis=1)
line.set_segments(segments)
return line,
# call the animator. blit=True means only re-draw the parts that have changed.
anim = animation.FuncAnimation(fig, animate, init_func=init,
frames=200, interval=20)