Swapping Blocks in a Matrix

Hello. I'm trying to swap the first two numbers of the first and second rows of this test matrix with the last two numbers of the second and third rows. Is there any way to swap these numbers in a matrix that's not one row and/or not on the same row?
x = [1 2 3 4 5;
6 7 8 9 10;
11 12 13 14 15]
The result should be:
x = [9 10 3 4 5;
14 15 8 1 2;
11 12 13 6 7]

 Risposta accettata

Stephen23
Stephen23 il 12 Set 2018
Modificato: Stephen23 il 12 Set 2018
>> x = [1,2,3,4,5;6,7,8,9,10;11,12,13,14,15]
x =
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
>> x([1,4,11,14]) = x([11,14,1,4])
x =
9 10 3 4 5
6 7 8 1 2
11 12 13 14 15
You can easily generate those linear indices with sub2ind.

1 Commento

The code to do it was actually this:
x([1,2,4,5,11,12,14,15]) = x([11,12,14,15,1,2,4,5])
...but thanks! I got the gist of it!

Accedi per commentare.

Più risposte (1)

Bruno Luong
Bruno Luong il 12 Set 2018
Modificato: Bruno Luong il 12 Set 2018
[x(1:2,1:2) x(2:3,4:5)] = deal(x(2:3,4:5),x(1:2,1:2))

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