matriz_a = [
[0, 0, 1],
[0, 1, 0],
[1, 0, 1]
]
print(matriz_a)
matriz_b = [
[2, 2, 3],
[3, 2, 2],
[3, 3, 3]
]
print(matriz_b)
Arrays in Python - Concatenate
0
Hello, I have two arrays and I would like to concatenate them, ie, put a matrix A and B on the other side of the matrix, in the case of forming a 3x6 matrix, but using a loop ("for" command) for this. can you help me? Thank you.
asked by anonymous 01.06.2018 / 18:23
2 answers
3
You can use the native function zip :
def matrix_union(A, B):
for a, b in zip(A, B):
yield [*a, *b]
The function return will be a generator in which each row will be the join of the lines of matrix A with matrix B.
For example:
A = [
[0, 0, 1],
[0, 1, 0],
[1, 0, 1]
]
B = [
[2, 2, 3],
[3, 2, 2],
[3, 3, 3]
]
print(list(matrix_union(A, B)))
See working at Repl.it | Ideone | GitHub GIST
Will generate:
[
[0, 0, 1, 2, 2, 3],
[0, 1, 0, 3, 2, 2],
[1, 0, 1, 3, 3, 3]
]
01.06.2018 / 19:17
0
You do not even have to use for . You can do the following:
matriz_a = [
[0, 0, 1],
[0, 1, 0],
[1, 0, 1]
]
matriz_b = [
[2, 2, 3],
[3, 2, 2],
[3, 3, 3]
]
matriz_c = [*matriz_a, *matriz_b]
print(matriz_c)
# [[0, 0, 1], [0, 1, 0], [1, 0, 1], [2, 2, 3], [3, 2, 2], [3, 3, 3]]
The operator * unpacks each of its arrays.
If you still want to use a for and no other method, you could do the following:
matriz_c = []
for matriz in (matriz_a, matriz_b):
for elemento in matriz:
matriz_c.append(elemento)
print(matriz_c)
# [[0, 0, 1], [0, 1, 0], [1, 0, 1], [2, 2, 3], [3, 2, 2], [3, 3, 3]]
01.06.2018 / 18:34