尽管matplotlib确实允许条形图中的阴影线，但AFAIK没有内置的方法来执行此操作。参见例如hatch_demo。
但是plt.imshow，以条形图的形式组合多个调用并不困难。这是一个相当粗糙的函数，可以使用图像的标志思想将图像用作基本的条形图。
import numpy as np
import matplotlib.pyplot as plt
from scipy.misc import imread
def image_plot(heights, images, spacing=0):
# Iterate through images and data, autoscaling the width to
# the aspect ratio of the image
for i, (height, img) in enumerate(zip(heights, images)):
AR = img.shape[1] / img.shape[0]
width = height * AR
left = width*i + spacing*i
right = left + width
plt.imshow(img, extent=[left, right, 0, height])
# Set x,y limits on plot window
plt.xlim(0, right)
plt.ylim(0, max(heights)*1.1)
# Read in flag images
usa_flag = imread('american_flag.png')
aussie_flag = imread('australian_flag.png').swapaxes(0, 1)
turkish_flag = imread('turkish_flag.png').swapaxes(0, 1)
# Make up some data about each country
usa_data = 33
aussie_data = 36
turkish_data = 27
data = [usa_data, aussie_data, turkish_data]
flags = [usa_flag, aussie_flag, turkish_flag]
image_plot(data, flags, spacing=2)
在不对x和y轴进行任何操作的情况下，返回此图。
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