I have a matrix and i want to create a new matrix which will be the old matrix, but without the first row and first column. is there a way to do this without using loops?
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I have a matrix and i want to create a new matrix which will be the old matrix, but without the first row and first column. is there a way to do this without using loops?
Simply put: no. But if you do not use jagged arrays but instead use multi-dim arrays, and if you take some time to study the memory layout of arrays in .NET, you could do it with unsafe pointers and erasing a part of the memory and moving the starting pointer of the multi-dim array. But it’d be still dependent on how you design your arrays and your matrixes whether this works or not.
However, I’d highly advice against it. There’s a big chance you screw up the type and confuse the garbage collector if you do so.
Alternatively, if you like to do this exercise, use C++/CLI for this task. In C++, you have more control and it’s easier to manipulate memory and move pointers directly. You also have more control over the destructor and finalizers, which may come in handy here. But, that said, then you still need marshaling. If you’d do all this for performance, I’d advice to go back to the simple loops, it’ll perform faster in most cases.