使用 rotation='vertical' 的垂直条形图不起作用

Question

从 matplot lib 示例中，lines_bars_and_markers 使用rotation='vertical'不会使其垂直。我究竟做错了什么？

"""
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然后交换轴的数据。你不能简单地写，rotation='vertical'因为这不会告诉matplotlib库任何东西，它只是创建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()