正态分布,Python实现

# coding=utf-8

import numpy as np

from scipy import stats

import matplotlib.pyplot as plt

n = 10

p = 0.3

k = np.arange(0,21)

binomial = stats.binom.pmf(k, n, p)

plt.plot(k, binomial, 'o-')

plt.title('Binomial: n=%i, p=%.2f' % (n, p), fontsize=15)

plt.xlabel('Number of successes')

plt.ylabel('Probability of successes', fontsize=15)

plt.show()