Вы можете попробовать нарисовать прямоугольники вручную, используя цикл:
import matplotlib.pyplot as plt
import matplotlib.patches as patches
import numpy as np
idx = np.linspace(0, 12, 12)
x = np.random.random(12)
y = [0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1]
fig, ax = plt.subplots(1)
ax.plot(idx, x)
rect_height = np.max(x)
rect_width = 1
for i, draw_rect in enumerate(y):
if draw_rect:
rect = patches.Rectangle(
(i, 0),
rect_width,
rect_height,
linewidth=1,
edgecolor='grey',
facecolor='grey',
fill=True
)
ax.add_patch(rect)
plt.show()