Question

How do you deal with aliasing issues when working with Armadillo, and what precautions should you take to avoid incorrect results?

Answer 1

To deal with aliasing issues in Armadillo, follow these precautions:

1. Avoid using expressions like A = B * A or A = A + B * A, as they can lead to incorrect results due to aliasing.
2. Use auxiliary variables for intermediate results: C = B * A; A = C;
3. Utilize .eval() function when necessary: A = (B * A).eval();
4. Be cautious with submatrix views and element-wise operations, as they may cause aliasing too.