[petsc-users] Does PETSc have some functions like A.*B, A./B in Matlab?
Yujie
recrusader at gmail.com
Sun Feb 21 14:58:39 CST 2010
At the beginning, I was just thinking whether PETSc has some similar
operations with Matlab like A./B or A.*B. To my understanding, PETSc
realizes a parallel operation version of Matlab regarding matrix
computations.
Thanks,
Yujie
On Sun, Feb 21, 2010 at 2:54 PM, Jed Brown <jed at 59a2.org> wrote:
> On Sun, 21 Feb 2010 14:44:55 -0600, Yujie <recrusader at gmail.com> wrote:
> > I need do it for many. Actually, we don't consider a vector. Generally,
> if A
> > is dense matrix (nonzero entries) and B is sparse matrix, MatGetRow()
> > doesn't work when doing A.*B or A./B directly, right?
>
> You can call MatGetRow with all column indices, you have to do something
> special about dividing by zero.
>
> But we're getting caught up in algebraic shenanigans again. What
> problem are you trying to solve? Why do you have a dense matrix and why
> do you think you need to perform A./B?
>
> Jed
>
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