[petsc-dev] MatCreateDense
Jose David Bermeol
jbermeol at purdue.edu
Thu Oct 31 20:38:43 CDT 2013
What do you mean with number of local columns??
Thanks
----- Original Message -----
From: "Matthew Knepley" <knepley at gmail.com>
To: "Jose David Bermeol" <jbermeol at purdue.edu>
Cc: "petsc-dev" <petsc-dev at mcs.anl.gov>, "petsc-users" <petsc-users at mcs.anl.gov>
Sent: Thursday, October 31, 2013 2:37:43 PM
Subject: Re: [petsc-dev] MatCreateDense
On Thu, Oct 31, 2013 at 1:21 PM, Jose David Bermeol < jbermeol at purdue.edu > wrote:
Hi small question. In the method MatCreateSeqDense(MPI_Comm comm,PetscInt m,PetscInt n,PetscScalar *data,Mat *A) I'm giving the local number of rows and columns, so I should pass the total number of local columns or I should pass columns/number_of_MPI process.
If its sequential, you pass the total number of columns. If its MatCreateMPIDense(), pass the number of local columns. This
is used to create a vector with the same layout as y = A^T x.
Matt
Thanks
--
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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