Hello everyone, I am trying to find elements in off diagonal blocks of a parallel sparse matrix. That is why, I want to use MatGetDiagonalBlock and from the matrix I obtain, I want to obtain off diagonal elements by subtracting it from my original matrix by using MatAXPY.
However, since MatGetDiagonalBlock gives a sequential matrix and my original one is parallel, I can't use MatAXPY. That's why I want to change the type of one of the matrices. How can I change a MATSEQAIJ to MATMPIAIJ or vice versa? Thanks!
