绘制图形，清除其坐标轴，然后绘制新图形

问题描述

我正在尝试执行以下操作:创建图形，在其上绘制图形，然后在3秒钟内清除其轴.发生这种情况时，应在同一图形上绘制新图形，并在屏幕上更新.

I'm trying to do the following: create a figure, plot a graph on it, then in 3 seconds clear its axes. When that happen a new graph should be plotted on the same figure and it should be updated on the screen.

类似的东西:

import matplotlib.pyplot as plt
import time

fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot([1,2,3],[1,2,3])
plt.show()
time.sleep(3)
plt.ion()
plt.cla()
ax.plot([10,20,30],[10,20,30])
fig.canvas.draw()

但它不起作用.这个逻辑有什么问题?

But it isn't working. What's wrong with this logic?

推荐答案

如果要对图形进行动画处理，可以使用 matplotlib.animation 库.您的代码如下所示:

If you want to animate your figures, you can use matplotlib.animation library.Here is what your code would look like:

import matplotlib.pyplot as plt
import time
import matplotlib.animation as animation

fig = plt.figure()
ax = fig.add_subplot(111)
line, = ax.plot([],[])
ax.set_xlim(3)
ax.set_ylim(3)
line.set_data([1,2,3],[1,2,3])

def init():
            """ Initializes the plots to have zero values."""
            line.set_data([],[])
            return line,

def animate(n, *args, **kwargs):
    if(n%2==0):
        line.set_data([],[])
    else:
        line.set_data([1,2,3],[1,2,3])

    return line,

ani = animation.FuncAnimation(fig, animate, init_func=init,frames =100, interval=10, blit=False, repeat =False)
fig.show()

查看matplotlib.animation以获得更多详细信息.此链接可以帮助您入门.

Look into matplotlib.animation for more details. This link can get you started.

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