Matplotlib で色付きの線分をプロットするには?

<code class="python">import numpy as np
import matplotlib.pyplot as plt

# Define line segment data
xy = (np.random.random((10, 2)) - 0.5).cumsum(axis=0)

# Create figure and axes
fig, ax = plt.subplots()

# Iterate through line segments
for start, stop in zip(xy[:-1], xy[1:]):
    x, y = zip(start, stop)
    ax.plot(x, y, color=np.random.rand(3))

plt.show()</code>

<code class="python">import numpy as np
import matplotlib.pyplot as plt
from matplotlib.collections import LineCollection

# Define line segment data
xy = (np.random.random((1000, 2)) - 0.5).cumsum(axis=0)

# Reshape data into segments
xy = xy.reshape(-1, 1, 2)
segments = np.hstack([xy[:-1], xy[1:]])

# Create figure and axes
fig, ax = plt.subplots()

# Create LineCollection with random colors
coll = LineCollection(segments, cmap=plt.cm.gist_ncar)
coll.set_array(np.random.random(xy.shape[0]))

# Add LineCollection to axes
ax.add_collection(coll)
ax.autoscale_view()

plt.show()</code>