Human: create matrix from 2 matrices. Assistant: 
Here is a Python function to create a matrix from 2 matrices

import numpy as np

def create_matrix(a, b):
    """Create matrix from 2 matrices."""
    return np.concatenate((a, b), axis=1)

# Enter the matrix
a = np.array([[1,2,3],[4,5,6],[7,8,9]])

# Enter the matrix
b = np.array([[10,11,12],[13,14,15],[16,17,18]])

# Calling the function
print((create_matrix(a, b)))

#Example Output

# [[ 1  2  3 10 11 12]
#  [ 4  5  6 13 14 15]
#  [ 7  8  9 16 17 18]]

#Remember to inspect code for bugs.