How to get the properties of a picked object in mplot3d (matplotlib + python)?

MatplotlibPythonData Visualization

To get the properties of picked objects in matplotlib 3d, we can take the following steps.

Steps

  • Set the figure size and adjust the padding between and around the subplots.

  • Create a new figure or activate an existing figure.

  • Add an 'ax' to the figure as part of a subplot arrangement.

  • Make a scatter plot of random data points.

  • Bind the function *pick_event_method* to the event *pick_event*.

  • Print x, y and z coordinates of the event.

  • To display the figure, use Show() method.

Example

import matplotlib.pyplot as plt
import numpy as np

plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True

fig = plt.figure()

ax = fig.add_subplot(111, projection='3d')

# Scatter plot
ax.scatter(np.random.rand(10), np.random.rand(10), np.random.rand(10), c=np.random.rand(10),
   cmap='hot', picker=5, s=100)


# pick_event_method
def pick_event_method(event):
   ind = event.ind[0]
   x, y, z = event.artist._offsets3d
   print(x[ind], y[ind], z[ind])


# Connect pick_event_method with pick_event
fig.canvas.mpl_connect('pick_event', pick_event_method)

plt.show()

Output

It will produce the following output −

Now, click the objects from the plot and it will display the coordinates of those points on the console.

0.29471404722373373 0.7272382336952506 0.551701540876738
0.7393059098968329 0.880733225356321 0.20733995579556608
0.4055966753557102 0.9709122739514328 0.10116103589732084
0.2781962334047674 0.48531626106129566 0.8573607199598575
raja
Published on 08-Oct-2021 12:52:14
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