1 import numpy as np 2 import matplotlib.pyplot as plt 3 size = 5 4 a = np.random.random(size) 5 b = np.random.random(size) 6 c = np.random.random(size) 7 d = np.random.random(size) 8 x = np.arange(size) 9 10 total_width, n = 0.8, 3 # 有多少個類型，只需更改n即可 11 width = total_width / n 12 x = x - (total_width - width) / 2 13 14 plt.bar(x, a, width=width, label='a') 15 plt.bar(x + width, b, width=width, label='b') 16 plt.bar(x + 2 * width, c, width=width, label='c') 17 plt.legend() 18 plt.show()
