初試matplotlib

matplotlib是一個Python的數學繪圖庫

這篇博文中主要放我在學習中碼的代碼和關鍵註釋、學習筆記

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2017/10/22

import numpy as np
import matplotlib.pyplot as plt

plt.rcdefaults()
fig, ax = plt.subplots()

# 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))

ax.barh(y_pos, performance, xerr=error, align='center',
        color='green', ecolor='black')
ax.set_yticks(y_pos)
ax.set_yticklabels(people)
ax.invert_yaxis()  # 默認的label是從後到前讀，此命令讓label從前往後讀，即從tom開始
ax.set_xlabel('Performance')
ax.set_title('How fast do you want to go today?')

plt.show()