【基础】学习笔记46-Python3 matplotlib绘图-堆积折线图

结果显示:

代码如下:

# 面积（堆积折线图）:stackplot

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)'''

# 堆叠折线图

y1p = y1 / (y1 + y2 + y3)

y2p = y2 / (y1 + y2 + y3)

y3p = y3 / (y1 + y2 + y3)

plt.subplot(1, 2, 1)

plt.stackplot(x, y1, y2, y3, baseline='zero', labels=[

'语文', '数学', '英语'], colors=['y', 'g', 'c'])

plt.xlim(0, 22)

plt.ylim(0, 280)

plt.legend(loc='upper right')

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

plt.subplot(1, 2, 2)

plt.stackplot(x, y1p, y2p, y3p, baseline='zero', labels=[

'语文', '数学', '英语'], colors=['y', 'g', 'c'])

plt.xlim(0, 20)

plt.ylim(0, 1)

plt.legend(loc='upper right')

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

plt.show()