IUnknown - 8 months ago 69

Python Question

We initialize a numpy array with zeros as bellow:

`np.zeros((N,N+1))`

But how do we check whether all elements in a given n*n numpy array matrix is zero.

The method just need to return a True if all the values are indeed zero.

Answer Source

Check out numpy.count_nonzero.

```
>>> np.count_nonzero(np.eye(4))
4
>>> np.count_nonzero([[0,1,7,0,0],[3,0,0,2,19]])
5
```