在matplotlib中向水平条形图添加数据标签[重复]

Question

我正在尝试将数据标签添加到水平条形图。数据看起来像这样，

Category = ['Communication',
 'Entertainment',
 'Family Support',
 'Food',
 'Healthcare',
 'House Rent',
 'Lending',
 'Transportation']

Cost = [-3100, -1299, -15000, -9127, -5000, -12000, -1000, -2100]

plt.barh(df['Category'], df['Cost'])

我想在上图中每个条的末尾添加数据标签。请帮忙！

Answer 1

添加 xlabel 和 ylabel 应该可以解决，

plt.xlabel("Cost")
plt.ylabel("Category")

您可能还想创建数据框：

import pandas as pd
df = {}
df["Category"] = Category
df["Cost"] = Cost
df = pd.DataFrame.from_dict(df)

要添加每个条的数据值，您可以修改代码如下：

# First make a subplot, so that axes is available containing the function bar_label.
fig, ax = plt.subplots()
g=ax.barh(df['Category'], df['Cost'])
ax.set_xlabel("Cost")
ax.set_ylabel("Category")
ax.bar_label(g, label_type="center") # This provides the labelling, this only available at higher version. You can do pip install -U matplotlib
plt.show()

参考：

1. Axis Label
2. matplotlib 3.4.2 and above has this

输出：