确定在 matplotlib 中单击按钮的子图 [英] Determine button clicked subplot in matplotlib

问题描述

给出具有多个图的图形，是否可以确定使用鼠标按钮单击了哪个图?

Given a figure with multiple plots, is there a way to determine which of them was clicked with a mouse button?

例如

fig = plt.figure()

ax  = fig.add_subplot(121)
ax.imshow(imsp0)

ax = fig.add_subplot(122)
ax.imshow(imsp1)

fig.canvas.mpl_connect("button_press_event",onclick_select)

def onclick_select(event):
  ... do something depending on the clicked subplot

推荐答案

如果你保留了两个坐标轴的句柄，你可以只查询发生点击的坐标轴；例如 if event.inaxes == ax:

If you retain a handle to both axes, you may just query the axes in which the click has happened; e.g. if event.inaxes == ax:

import matplotlib.pyplot as plt
import numpy as np

imsp0 = np.random.rand(10,10)
imsp1 = np.random.rand(10,10)

fig = plt.figure()

ax  = fig.add_subplot(121)
ax.imshow(imsp0)

ax2 = fig.add_subplot(122)
ax2.imshow(imsp1)

def onclick_select(event):
    if event.inaxes == ax:
        print ("event in ax")
    elif event.inaxes == ax2:
        print ("event in ax2")

fig.canvas.mpl_connect("button_press_event",onclick_select)

plt.show()

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