9951 explained code solutions for 126 technologies

# python-scipyHow do I create an array of zeros with the same shape as an existing array using Python and NumPy?

Creating an array of zeros with the same shape as an existing array using Python and NumPy is easy. To do this, you can use the `np.zeros_like` function. This function takes an existing array and creates a new array filled with zeros that has the same shape as the existing array.

For example:

``````import numpy as np

arr = np.array([[1,2,3],
[4,5,6]])

arr_zeros = np.zeros_like(arr)

print(arr_zeros)``````

## Output example

``````[[0 0 0]
[0 0 0]]``````

The code above creates an array `arr` with shape `(2,3)` and then creates a new array `arr_zeros` with the same shape as `arr` filled with zeros.

## Code explanation

1. `import numpy as np`: Imports the NumPy library as `np`.
2. `arr = np.array([[1,2,3], [4,5,6]])`: Creates an array `arr` with shape `(2,3)`.
3. `arr_zeros = np.zeros_like(arr)`: Creates a new array `arr_zeros` with the same shape as `arr` filled with zeros.
4. `print(arr_zeros)`: Prints the new array.