堆积柱形图Python

以下是绘制堆积柱形图的Python代码和解释：

引入库：

import matplotlib.pyplot as plt
import numpy as np

数据准备：

# 生成数据
N = 5
men_means = (20, 35, 30, 35, 27)
women_means = (25, 32, 34, 20, 25)
men_std = (2, 3, 4, 1, 2)
women_std = (3, 5, 2, 3, 3)
ind = np.arange(N)    # the x locations for the groups
width = 0.35       # the width of the bars: can also be len(x) sequence

绘制堆积柱形图：

# 绘制柱形图
p1 = plt.bar(ind, men_means, width, yerr=men_std)
p2 = plt.bar(ind, women_means, width,
             bottom=men_means, yerr=women_std)

# 添加图例、标签和标题
plt.ylabel('Scores')
plt.title('Scores by group and gender')
plt.xticks(ind, ('G1', 'G2', 'G3', 'G4', 'G5'))
plt.yticks(np.arange(0, 81, 10))
plt.legend((p1[0], p2[0]), ('Men', 'Women'))

# 显示图形
plt.show()

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