反转 matplotlib 中的堆叠条形图

Question

I would like to invert the position of the colours in the bar chart below.

这是用于生成图表的部分代码：

ax.bar(date,caloric_intake, width=0.4)
ax.bar(date,exercice_deficit,width=0.4,bottom=caloric_intake )

我已尝试使用底部参数，但图表中的结果条变得更高。 as seen in this picture

有谁知道如何解决这个问题？提前致谢。

Answer 1

我没有看到您的代码。但在此示例中，堆叠条顶部的第一个图中的“ax.bar”设置，见下文：

import matplotlib.pyplot as plt


labels = ['G1', 'G2', 'G3', 'G4', 'G5']
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]
width = 0.35 

fig, ax = plt.subplots()

ax.bar(labels, women_means, width, yerr=women_std, bottom=men_means,label='Women')
ax.bar(labels, men_means, width, yerr=men_std, label='Men')


ax.set_ylabel('Scores')
ax.set_title('Scores by group and gender')
ax.legend()

plt.show()

输出：

import matplotlib.pyplot as plt


labels = ['G1', 'G2', 'G3', 'G4', 'G5']
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]
width = 0.35 

fig, ax = plt.subplots()

ax.bar(labels, men_means, width, yerr=men_std, label='Men')
ax.bar(labels, women_means, width, yerr=women_std, bottom=men_means,label='Women')


ax.set_ylabel('Scores')
ax.set_title('Scores by group and gender')
ax.legend()

plt.show()

输出：