[petsc-users] Fwd: matrix dot product multiplication with petsc
Matthew Knepley
knepley at gmail.com
Mon Jul 23 21:20:31 CDT 2012
On Mon, Jul 23, 2012 at 9:18 PM, Nicholas Pezolano <npezolano at gmail.com>wrote:
> @Matt,
>
> thanks but this is just general matrix multiplication , not the dot
> product multiplication's for a matrix
>
Please explain to me the difference.
Matt
>
> @Jed Brown
>
> I am trying to draw random numbers from a complex multivariate mixture
> distribution needed for a monte carlo simulation. X:= mu + Lambda.* W +
> gamma.*sqrt(W) , where they are all NxN dense matrices of equal size where
> N ranges from 100,000 to 2,000,000. I need to do the dot product
> multiplication and addition for every part of this distribution. Would
> petsc be the right tool for this or should i just stick to C and mpi. I've
> already used many petsc functions that have made life much eaiser
>
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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