假设你有一个散点图，scat = ax.scatter(...)， 然后你可以
-
改变立场
scat.set_offsets(array)
where array is a N x 2x 和 y 坐标的形状数组。
-
改变尺寸
scat.set_sizes(array)
where array是大小以点为单位的一维数组。
-
改变颜色
scat.set_array(array)
where array是一个将进行颜色映射的一维值数组。
这是一个使用的快速示例动画模块 https://matplotlib.org/api/animation_api.html.
它比实际需要的稍微复杂一些，但这应该为您提供一个框架来完成更奇特的事情。
（代码于 2019 年 4 月编辑，以与当前版本兼容。有关旧代码，请参阅修订记录 https://stackoverflow.com/questions/9401658/revisions)
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import numpy as np
class AnimatedScatter(object):
"""An animated scatter plot using matplotlib.animations.FuncAnimation."""
def __init__(self, numpoints=50):
self.numpoints = numpoints
self.stream = self.data_stream()
# Setup the figure and axes...
self.fig, self.ax = plt.subplots()
# Then setup FuncAnimation.
self.ani = animation.FuncAnimation(self.fig, self.update, interval=5,
init_func=self.setup_plot, blit=True)
def setup_plot(self):
"""Initial drawing of the scatter plot."""
x, y, s, c = next(self.stream).T
self.scat = self.ax.scatter(x, y, c=c, s=s, vmin=0, vmax=1,
cmap="jet", edgecolor="k")
self.ax.axis([-10, 10, -10, 10])
# For FuncAnimation's sake, we need to return the artist we'll be using
# Note that it expects a sequence of artists, thus the trailing comma.
return self.scat,
def data_stream(self):
"""Generate a random walk (brownian motion). Data is scaled to produce
a soft "flickering" effect."""
xy = (np.random.random((self.numpoints, 2))-0.5)*10
s, c = np.random.random((self.numpoints, 2)).T
while True:
xy += 0.03 * (np.random.random((self.numpoints, 2)) - 0.5)
s += 0.05 * (np.random.random(self.numpoints) - 0.5)
c += 0.02 * (np.random.random(self.numpoints) - 0.5)
yield np.c_[xy[:,0], xy[:,1], s, c]
def update(self, i):
"""Update the scatter plot."""
data = next(self.stream)
# Set x and y data...
self.scat.set_offsets(data[:, :2])
# Set sizes...
self.scat.set_sizes(300 * abs(data[:, 2])**1.5 + 100)
# Set colors..
self.scat.set_array(data[:, 3])
# We need to return the updated artist for FuncAnimation to draw..
# Note that it expects a sequence of artists, thus the trailing comma.
return self.scat,
if __name__ == '__main__':
a = AnimatedScatter()
plt.show()
如果您使用 OSX 并使用 OSX 后端，则需要更改blit=True to blit=False in the FuncAnimation下面初始化。 OSX 后端不完全支持位块传送。性能会受到影响，但该示例应该在禁用位块传输的 OSX 上正确运行。
对于一个仅更新颜色的更简单的示例，请查看以下内容：
import matplotlib.pyplot as plt
import numpy as np
import matplotlib.animation as animation
def main():
numframes = 100
numpoints = 10
color_data = np.random.random((numframes, numpoints))
x, y, c = np.random.random((3, numpoints))
fig = plt.figure()
scat = plt.scatter(x, y, c=c, s=100)
ani = animation.FuncAnimation(fig, update_plot, frames=range(numframes),
fargs=(color_data, scat))
plt.show()
def update_plot(i, data, scat):
scat.set_array(data[i])
return scat,
main()
