TheGrapeBeyond - 9 months ago 43

Python Question

This question here was useful, but mine is slightly different.

I am trying to do something simple here, I have a numpy matrix **A**, and I simply want to create another numpy matrix **B**, of the same shape as **A**, but I want **B** to be created from

`numpy.random.randn()`

Answer

`np.random.randn`

takes the shape of the array as its input which you can get directly from the `shape`

property of the first array. You have to unpack `a.shape`

with the `*`

operator in order to get the proper input for `np.random.randn`

.

```
a = np.zeros([2, 3])
print(a.shape)
# outputs: (2, 3)
b = np.random.randn(*a.shape)
print(b.shape)
# outputs: (2, 3)
```