我有一个 3D 点云的散点图（见图）。绿色点实际上形成了星形的挤压，蓝色是五边形等，但这很难看到。所以我想对点云进行一些“着色”。可以对表面做这种事情（就像在这里讨论的那样：
我目前拥有的代码：
import sys
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns; sns.set() # for plot styling
filename = sys.argv[1]
# flow_events = np.loadtxt(filename, comments='#')
flow_events = pd.read_csv(filename, delimiter = "\t", skiprows=1, names=["event_x", "event_y", "event_ts", "event_label"])
n_flow_events = flow_events.values
# start = int(n_flow_events.shape[0]/3.0)
end = int(n_flow_events.shape[0]/10.0*7)
start = 0
# end = n_flow_events.shape[0]
events = n_flow_events[start:end, :]
number_to_display = 5
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(events[0::number_to_display, 0], events[0::number_to_display, 1], events[0::number_to_display, 2], c=(events[0::number_to_display, 3]+4), s=4, cmap=plt.cm.brg)
ax.set_xlabel('x')
ax.set_ylabel('y')
ax.set_zlabel('time [s]')
plt.show()
