python堆积条形图渐变_【基础】学习笔记42-Python3 matplotlib绘图-堆积柱形图

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)

# 堆积柱形图

plt.bar(x, y1, color='y', label='语文')

plt.bar(x, y2, bottom=y1, color='g', label='数学')

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

# 显示范围

plt.xlim(-2, 22)

plt.ylim(0, 280)

# 添加图例

plt.legend(loc='upper right')

plt.grid(axis='y', color='grey', linestyle=':', linewidth=1)  # 网格

plt.show()