Vector as accessor into a Matrix

@Colin_Green wrote:

I see there's a way of obtaining a Vector from a Matrx row or column, and that this copies the matrix elements. I was wondering if it would be useful to have a Vector subclass that uses the matrix row or column as it's underlying storage?

Sometimes it's useful (and makes for cleaner code) to define a function as operating on Vector rather than passing in a matrix and the index of the row/column to operate on. We can use Row() and Column() today, but that introduces the overhead of copying data.

Just an idea.

Thanks.

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