How to create for loop for submatrix and print submatrix

Question

I am trying to create for loop for submatrix, let say

matrix = [
    [1, 0, 1, 3],
    [0, 2, 2, 2],
    [1, 2, 3, 4],
    [1, 2, 3, 4]
]

I want to print submatrix from matrix[2][3] to matrix[4][4] where index start at 1.

Output what i expect -

    [2, 2]
    [3, 4]
    [3, 4]

You won't be able to have the index starts at 1 unless you create a specific function to handle this behaviour. — nathaner, Aug 01 '20 at 08:01
Does this answer your question? [Python: slicing a multi-dimensional array](https://stackoverflow.com/questions/17277100/python-slicing-a-multi-dimensional-array) — nathaner, Aug 01 '20 at 08:04
Does this answer your question? [Extract elements in nested list into separate lists according to positions](https://stackoverflow.com/questions/62694894/extract-elements-in-nested-list-into-separate-lists-according-to-positions) — Roshin Raphel, Aug 01 '20 at 08:05

score 0 · Answer 1 · answered Aug 01 '20 at 08:06

You could use a range for those coordinates, just keep in mind that list indexes in python are zero based and that ranges are inclusive of the start index but exclusive of the end index:

for row in range(2, 5):
    for col in range (3, 5):
       print(matrix[row - 1][col - 1], end=' ')
    print()

salilnaik · Answer 2 · 2020-08-01T08:13:40.770

0

This could work

print([x[2:] for x in matrix[1:]])

edited Aug 01 '20 at 08:13

answered Aug 01 '20 at 08:07

salilnaik

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How to create for loop for submatrix and print submatrix

2 Answers2