Paolo Orsini <[email protected]> writes: > MatConvert was slow when I tested 10 days ago, because was not > preallocating the new matrix (see initial part of this thread). I was > trying to find a work around. > Unless you already fixed this, did you?... I haven't reinstalled petsc from > then
Thanks for the reminder, I forgot that we were missing a specialized function. What I recommended should work and be fast with 'next'. Can you try that? > I need the final Dual Graph (the filtered matrix) in Adj mat format. > I will extract indices from the AIJ matrix (the matrix to filter), and I I > will create a new Adj (avoiding to do an in-place operation as you > suggested) Yeah, it can't really be done in-place anyway.
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