[记录思路]正态分布置信区间填充颜色

正态分布 1 σ置信区间填充颜色

#制造1000个随机数据

x = np.linspace(60,260,1000)
cigema = 20
miu = 172

#绘制σ=20,μ=172的正态分布

fx = 1 / (cigema * (2 * np.pi)**0.5) * np.exp(-(x - miu)**2 / (2 * cigema**2))
plt.plot(x,fx,color='dodgerblue')

#取μ ~ 1σ的区间

fanwei = x[(x>miu) & (x

#该范围对应的fx

fx2 = 1 / (cigema * (2 * np.pi)**0.5) * np.exp(-(fanwei - miu)**2 / (2 * cigema**2))

#该范围内的曲线与x轴之间的颜色填充

y = np.zeros(fanwei.size)
plt.fill_between(fanwei,fx2,y,fx2 > y,alpha=0.6,color='dodgerblue')
plt.show()