【基础】学习笔记45-Python3 matplotlib绘图-堆积条形图

结果如图:

代码如下:

import matplotlib.pyplot as plt

import numpy as np

plt.rcParams['font.sans-serif'] = ['Arial Unicode MS']

# 生成数据

x = np.linspace(0, 20, 20)

y1 = np.random.randint(50, 100, 20)

y2 = np.random.randint(50, 100, 20)

y3 = np.random.randint(50, 100, 20)

# 堆积条形图

plt.barh(x, y1, color='y', label='语文')

plt.barh(x, y2, left=y1, color='g', label='数学')

plt.barh(x, y3, left=y1 + y2, color='c', label='英语')

# 显示范围

plt.ylim(-2, 22)

plt.xlim(0, 280)

# 添加图例

plt.legend(loc='upper right')

plt.grid(axis='x', color='grey', linestyle=':', linewidth=1)

plt.show()