Thanks a lot.
--
AppSumo Presents a FREE Video for the SourceForge Community by Eric
Ries, the creator of the Lean Startup Methodology on "Lean Startup
Secrets Revealed." This video shows you how to validate your ideas,
Thanks Jed for the reply,
I tried what you suggested but since the matrix that I have is called
matrix_A, I tried the following:
Mat A = matrix_A.mat();
matrix_A is created by SparseMatrix& matrix_A =
*eigen_system.matrix_A;
I got the following error
error: ‘struct libMesh::SparseMatrix’ has n
Hi everyone,
Is it possible to export the stiffness matrix once it has been
assembled into Petsc binary format?
Regards,
Omar
--
AppSumo Presents a FREE Video for the SourceForge Community by Eric
Ries, the creator of t
Thanks for the suggestions.
John are you suggesting that within my Libmesh code and prior to specifying
the position of the spectrum I shall write ... (-st_shift .75) and then I
specify the spectrum to LARGEST_MAGNITUDE ??
I would appreciate your help.
Omar
---
Hi,
I am using Libmesh with Slepc for solving the eigen system that I have. I
know that in Slepc there is an option to search for eigenvalues around
specific target (say eigenvalues around 0.75), so is there a way in Libmesh
to specify this target rather than setting the position of the spectrum t
e for Petsc 3.1. If you are using a different
> version there will most likely be a slightly different way to tell it to
> keep the nonzero pattern. I recommend setting this each time before you
> start filling the matrix up. Petsc seems to like to forget about this
> option.
>
>
Thank you all for all the suggestions you made.
In fact I tried doing two seperate sweeps as Boyce suggested, but it seems
that I am doing a mistake which leads to no change in mass matrix.
This how I am doing that after the first sweep for assembling the matrices:
.
.
.
for ( ; el != end_el; ++el
Hi everyone,
I am trying to define the boundary conditions in a way which I am more
familiar with. I have only one type of BC which is Drichilet and I am doing
that simply by making indices that are on the outer surface of the domain to
be zero in the stiffness (k) and mass (m) matrix and 1 for th
Hi,
Is it possible to export the mass and stiffness matrices that is created by
Libmesh to any data file?
Regards,
Omar
--
Benefiting from Server Virtualization: Beyond Initial Workload
Consolidation -- Increasing the us
About searching for the smallest eigenvalues.
Ok I figured it out. In fact that option was there in example 17 but in a
commented line.
:-)
On Thu, Apr 14, 2011 at 12:32 PM, Omar Al-Abbasi wrote:
> Hi everyone,
>
> I am solving a generalized eigenvalue problem and I followed e
Hi everyone,
I am solving a generalized eigenvalue problem and I followed example 17
successfully until now. My question is how to specify the option for SLEPc
so it searches for the smallest eigenvalues. I know that this option is
there but unfortunately I don't know how to implement it.
Many th
Thank you all.
So it seems that the problem is memory allocation.
Ok is there any suggestion to solve this problem.
On Wed, Apr 13, 2011 at 5:42 PM, Derek Gaston wrote:
> On Apr 13, 2011, at 3:32 PM, Roy Stogner wrote:
>
> > No; you're getting it because you're trying to write to unallocated
>
Hi everyone,
I am trying to add a term to a the stiffness matrix which is V and it
appears as follows:
for (unsigned int i=0; ihttp://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html#Signal[0]PETSCERROR:
or try
http://valgrind.org on GNU/linux and Apple Mac OS X to find memory
c
13 matches
Mail list logo
