To obtain the shape, use the following command:

In addition, you can keep adding more arrays and updating them using the same command.

There are three possible solutions to the issue:

1. Reshape the initial array to have three columns, matching the desired number of columns.

2. Implement an if-else statement to handle the case of an empty initial array.

3. Use a specific tool to solve the problem.

For the second solution, you can either use option 1 or option 2.

Regarding solution 2, you could consider using a pair of nested loops as an alternative. However, this may not be as efficient as using regular numpy arrays.

Solution:

To stack arrays vertically, simply utilize the code

np.vstack()

.

To obtain the desired shape, use the following command:

combined = np.vstack(([testMat1], [testMat2], [testMat3]))

.

By utilizing

combined = np.vstack((combined, [testMat4]))

, it’s possible to add additional arrays and modify them continuously, ultimately yielding the shape

(4, 2, 4)

.