Matplotlib を使用してさまざまな色で線をプロットする方法

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

def uniqueish_color():
    """Generate a unique-looking color."""
    return plt.cm.gist_ncar(np.random.random())

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

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

# Iterate over segments
for start, stop in zip(xy[:-1], xy[1:]):
    x, y = zip(start, stop)
    ax.plot(x, y, color=uniqueish_color())

# Display the plot
plt.show()</code>

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

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

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

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

# Create a LineCollection
coll = LineCollection(segments, cmap=plt.cm.gist_ncar)

# Set colors
coll.set_array(np.random.random(xy.shape[0]))

# Add collection to axis
ax.add_collection(coll)

# Adjust view
ax.autoscale_view()

# Display the plot
plt.show()</code>