Is it possible to set the size of the COMPACT matrix as large as the WIDE
matrix, then do MatAYPX(WIDE, 0, COMPACT, SUBSET_NONZERO_PATTERN), i.e,
WIDE = 0*WIDE + COMPACT? You need to build WIDE upfront once, but if you
repeat, the other MatAYPX will be fast.
--Junchao Zhang
On Thu, Sep 26, 2024
No, Setting a bigger matrix size won't have a negative impact. Only the
actual number of nonzeros matters.
--Junchao Zhang
On Thu, Sep 26, 2024 at 1:33 PM Frank Bramkamp wrote:
> Thanks for the reply,
>
> when setting the size larger than needed, would that have any negative
> impact somewher
Frank,
Sorry for the confusion. MatCopy() and MatAXPY() only work for identically
sized matrices.
Even if the two matrices are the same size but one, say A, has a subset of
nonzeros than the other, say B, what you want to do is non-trivial. This is
because to do a copy you must MatAs
