python - 使用旋转 ='vertical' 的垂直条形图不起作用

Question

来自 matplot 库示例 lines_bars_and_markers使用 rotation='vertical' 不会使其垂直。我做错了什么？

"""
Simple demo of a horizontal bar chart.
"""
import matplotlib.pyplot as plt
plt.rcdefaults()
import numpy as np
import matplotlib.pyplot as plt


# Example data
people = ('Tom', 'Dick', 'Harry', 'Slim', 'Jim')
y_pos = np.arange(len(people))
performance = 3 + 10 * np.random.rand(len(people))
error = np.random.rand(len(people))

plt.barh(y_pos, performance, xerr=error, align='center', alpha=0.4)
plt.yticks(y_pos, people)
plt.xlabel('Performance')
plt.title('How fast do you want to go today?')

plt.show()
rotation='vertical'

Answer 1

barh 用于水平条形图，更改为 bar 然后围绕数据交换坐标轴。您不能简单地编写 rotation='vertical'，因为这并没有告诉 matplotlib 库任何信息，它只是创建了一个从未使用过的字符串。

import matplotlib.pyplot as plt
plt.rcdefaults()
import numpy as np
import matplotlib.pyplot as plt


# Example data
people = ('Tom', 'Dick', 'Harry', 'Slim', 'Jim')
x_pos = np.arange(len(people))
performance = 3 + 10 * np.random.rand(len(people))
error = np.random.rand(len(people))

plt.bar(x_pos, performance, yerr=error, align='center', alpha=0.4)
plt.xticks(x_pos, people)
plt.ylabel('Performance')
plt.title('How fast do you want to go today?')

plt.show()