在 Matplotlib 中的两个图之间画线 [英] Drawing lines between two plots in Matplotlib

问题描述

我正在用 Matplotlib 绘制两个子图，基本上如下:

subplot(211);显示(一)；分散(...，...)子图(212)；显示(b)；分散(...，...)

我可以在这两个子图之间画线吗?我该怎么做?

解决方案

其他答案的解决方案在许多情况下都不是最优的(因为它们只有在计算点后不对绘图进行更改才有效).

>

更好的解决方案是使用专门设计的

I am drawing two subplots with Matplotlib, essentially following :

subplot(211); imshow(a); scatter(..., ...)
subplot(212); imshow(b); scatter(..., ...)

Can I draw lines between those two subplots? How would I do that?

解决方案

The solution from the other answers are suboptimal in many cases (as they would only work if no changes are made to the plot after calculating the points).

A better solution would use the specially designed ConnectionPatch:

import matplotlib.pyplot as plt
from matplotlib.patches import ConnectionPatch
import numpy as np

fig = plt.figure(figsize=(10,5))
ax1 = fig.add_subplot(121)
ax2 = fig.add_subplot(122)

x,y = np.random.rand(100),np.random.rand(100)

ax1.plot(x,y,'ko')
ax2.plot(x,y,'ko')

i = 10
xy = (x[i],y[i])
con = ConnectionPatch(xyA=xy, xyB=xy, coordsA="data", coordsB="data",
                      axesA=ax2, axesB=ax1, color="red")
ax2.add_artist(con)

ax1.plot(x[i],y[i],'ro',markersize=10)
ax2.plot(x[i],y[i],'ro',markersize=10)


plt.show()

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