1.np.random.normal(loc=0.0, scale=1.0, size=None)
返回满足mu = loc, sigma = scale的N个随机的正态分布数据
2.numpy.linspace(start,stop,num=50,endpoint=True,retstep=False,dtype=None)
Return evenly spaced numbers over a specified interval.
Returnsnumevenly spaced samples, calculated over the interval [start,stop].
The endpoint of the interval can optionally be excluded.
