python - 通过animation.FuncAnimation绘制列表字典

Question

我在使用 animation.FuncAnimation 更新每帧的行时遇到问题。

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from sys import exit
#update set line a value(a list) of dict data
def update_line(num ,data, line):
    line.set_data(data[num*0.1])
    return line,

fig1 = plt.figure()

# just creat a dictionary of lists by variable length
data = {}
for i in range(20):
    t = i*0.1
    data[t] = [j*.5 for j in range(np.random.randint(2,5))]
    print t , data[t]

l, = plt.plot([], [], 'r-')
line_ani = animation.FuncAnimation(fig1, update_line, 5, fargs=(data, l),
                                   interval=500)
plt.show()

上面的代码给了我一个ValueError:太多值无法解压。
感谢您的任何评论或指导。

Answer 1

问题是您没有设置任何应绘制 ydata 的 xdata。正确的调用应该是 line.set_data(x, y)。

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation

#update set line a value(a list) of dict data
def update_line(num ,data, line):
    y = data[num*0.1]
    line.set_data(range(len(y)), y)

fig1 = plt.figure()

# just creat a dictionary of lists by variable length
data = {}
for i in range(20):
    t = i*0.1
    data[t] = [j*.5 for j in range(np.random.randint(2,5))]

l, = plt.plot([], [], 'r-')
line_ani = animation.FuncAnimation(fig1, update_line, 20, fargs=(data, l),
                                   interval=500, repeat=True)
plt.xlim(0,5)
plt.ylim(0,2.5)
plt.show()