Plotting histogram of an array in Python

I want to plot a histogram of an array A which will show me the distribution of all the values. But I am getting an error.

import numpy as np
A=np.array([[1.83221749e-01],
       [1.97088986e-03]         # <- missing comma here
       [1.97088986e-03],
       [8.50798103e-03],
  开发者_运维百科     [2.53104351e-01],
       [2.02513388e-03],
       [1.93131808e-03],
       [4.12731231e-03],
       [1.11217813e-02],
       [3.59568196e-03]])
B=np.histogram(A)

The error is

in line 9, in <module>
    [1.97088986e-03]

TypeError: list indices must be integers or slices, not float

---

It appears a comma was omitted from the array. After fixing it you can use plt.bar:

plt.bar(np.arange(len(A)),A)
plt.show()