Python，卷积

发布于 2025-01-24 01:23:34 字数 379 浏览 3 评论 0原文

我想在每三个幻灯片后占据MAT（矩阵）的一部分。我所拥有的代码是在一张幻灯片之后取下矩阵的一部分。我想将矩阵的前3乘3部分乘以3列，然后向右滑动3列，然后将3乘3部分拿走，依此类推，遍历所有矩阵。

n1=np.array(([1,2,3,4,5,6],[7,8,9,10,11,12],[12,13,14,15,16,17],[18,19,20,21,22,23],[24,25,26,27,28,29],[30,31,32,33,34,35]))
print(n1)
k=3
    for i in range(3):
        for j in range(3):
            mat = n1[i:i+k, j:j+k]
            print(mat)

原文

I want to take the part of mat (matrix) after every three slides. The code I have is taking the part of matrix after one slide.
I want to take the first 3 by 3 part of the matrix and then slide 3 columns to the right and take 3 by 3 part and so on, going through all the matrix.

n1=np.array(([1,2,3,4,5,6],[7,8,9,10,11,12],[12,13,14,15,16,17],[18,19,20,21,22,23],[24,25,26,27,28,29],[30,31,32,33,34,35]))
print(n1)
k=3
    for i in range(3):
        for j in range(3):
            mat = n1[i:i+k, j:j+k]
            print(mat)

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青丝拂面 2025-01-31 01:23:34

您可以在行和col上使用切片，例如代码bellow ...
查看文档在这里

import numpy as np

n1=np.array(([1,2,3,4,5,6],[7,8,9,10,11,12],[12,13,14,15,16,17],[18,19,20,21,22,23],[24,25,26,27,28,29],[30,31,32,33,34,35]))
print(n1)

MAX_WIDTH = 3
MAX_HEIGHT = 3

for r in range(0, len(n1[0]), MAX_HEIGHT):
    for c in range(0, len(n1), MAX_WIDTH):
        print(n1[r:r+MAX_HEIGHT, c:c+MAX_WIDTH])

You can use slicing on both rows and cols like the code bellow...
Check out the docs here

import numpy as np

n1=np.array(([1,2,3,4,5,6],[7,8,9,10,11,12],[12,13,14,15,16,17],[18,19,20,21,22,23],[24,25,26,27,28,29],[30,31,32,33,34,35]))
print(n1)

MAX_WIDTH = 3
MAX_HEIGHT = 3

for r in range(0, len(n1[0]), MAX_HEIGHT):
    for c in range(0, len(n1), MAX_WIDTH):
        print(n1[r:r+MAX_HEIGHT, c:c+MAX_WIDTH])

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