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How to operate on different rows of the same matrix?
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Good morning folks, I need your help to figure out a possible solution for my issue. I can't find a way out.
Let's consider this matrix A:
1 4 -2 0
2 0 -2 0
3 0 -3 0
4 2 -2 0
I want to operate on the rows, in order to do some operations. Let's stick, for easiness' sake, to this problem: I want to pair the first elements of two different rows. I.e.:
[1, 2]; [1, 3]; [1, 4]; [2, 3]; [2, 4]; [3, 4]
so, it's the first row with the second, the first with the third, the first with the fourth, the second with the third, the second with the fourth, so on...
I had the job done with nested for cycles, but... my supervisor wants me to use a different solution. I need help as I can't find a way out but I desperately need this!