如何解决 numpy.ndarray' object 在 python 上没有属性“直方图”

Question

I want to randomly select numbers with the probability acording to the sum of 2 normal/gaussian distributions and make a histogram.

basicaly

import numpy as np    
u, vth = 0,1 # mean and standard deviation
    v= np.random.normal(u, vth, 1000)+np.random.normal(-u, vth, 1000)
    v.histogram()

However I get the error numpy.ndarray' object has no attribute 'histogram'. Another problem is that this isn't normalized so my results shouldn't be right...

Answer 1

I think what you are looking for is to make a histogram plot of a normal distribution. Have you tried using matplotlib library's histogram function? It can be done easily like so:

import numpy as np    
u, vth = 0,1 # mean and standard deviation
v= np.random.normal(u, vth, 1000)+np.random.normal(-u, vth, 1000)

import matplotlib.pyplot as plt
plt.hist(v)