import numpy as np
import matplotlib.pyplot as plt
from matplotlib.patches import PathPatch
# Make a random x and a y to go with it.
np.random.seed(26)
x = np.random.normal(0, 1, 200).cumsum()
y = np.arange(x.size)
# Set up the figure.
fig, ax = plt.subplots(figsize=(2, 10))
# Make the background 'image'.
im = ax.imshow(x.reshape(-1, 1),
aspect='auto',
origin='lower',
extent=[x.min(), x.max(), y.min(), y.max()]
)
# Draw the path.
paths = ax.fill_betweenx(y, x, x.min(),
facecolor='none',
lw=2,
edgecolor='b',
)
# Make the 'fill' mask and clip the background image with it.
patch = PathPatch(paths._paths[0], visible=False)
ax.add_artist(patch)
im.set_clip_path(patch)
# Finish up.
ax.invert_yaxis()
plt.show()
您可以使用
imshow
将填充绘制为背景,然后剪切它。您可以使用fill_betweenx
来制作遮罩。在下面是一个使用随机数据的示例:
这就产生了:
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