How do I concatenate arrays in NumPy?

How do I concatenate arrays in NumPy?

You can use the numpy.concatenate() function to join two or more arrays along an existing axis.

Can you show me an example of using numpy.concatenate()?

Sure! Here's a simple example:

import numpy as np

array1 = np.array([1, 2, 3])
array2 = np.array([4, 5, 6])
result = np.concatenate((array1, array2))
print(result)  # Output: [1 2 3 4 5 6]

What if I want to concatenate along a different axis?

You can specify the axis parameter in numpy.concatenate(). For example, to concatenate 2D arrays along axis 0, you would do:

array1 = np.array([[1, 2, 3], [4, 5, 6]])
array2 = np.array([[7, 8, 9]])
result = np.concatenate((array1, array2), axis=0)
print(result)