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+---- Thread: [Java] Don't really understand how matrix's work (/showthread.php?tid=5724323)
Don't really understand how matrix's work - Autowall - Sep 24, 2017
Prepare a matrix codes that picks a row (it does not necessarily have to be the first row), moves it to the top of the matrix, and turns the first number into a 1, using only the three allowed matrix operations. (Don't forget, you cannot turn a 0 into a 1, but any other number is fair game.)
I am doing my homework assignment and really don't understand the logic behind it. If anyone can help me with this I would appreciate it. It really doesn't have to be a full working code.
* - MadZ - Sep 25, 2017
Here's the logic behind it.
1) Start with some matrix (I will be using the following 3x3 matrix):
int[][] matrix:
3 5 6
9 2 4
9 4 6
2) Pick any row to be moved to the top (I'll be using row 2):
3 5 6 => 9 2 4
9 2 4 => 3 5 6
9 4 6 => 9 4 6
3) Check if first number is != 0, change to 1 (9 != 0):
1 2 4
3 5 6
9 4 6
What are the matrix operations you're allowed to use?
RE: Don't really understand how matrix's work - Marduno - Nov 24, 2017
Matrix is simply a 2D array.