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import numpy as np
from matplotlib import pyplot as plt
mu, sigma , num_bins = 100, 15, 20
np.random.seed(0)
x = np.random.normal(loc=mu, scale=sigma, size=1000)
#画直方图
n, bins, patches = plt.hist(x, num_bins, density='normed', facecolor = 'blue', alpha = 0.5)
网上看别人的图有间隔线,我自己运行就没有。。。,求助,谢谢!
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