[Trilinos-Users] info on SumIntoGlobalValues for CsrFEMatrix

Thu Feb 19 03:14:07 MST 2009

Dear all,
    i have been trying, without much success, to find more info on how
to perform a "standard FE assembly".

suppose i have the matrix

1 2 3
3 4 5
6 7 8

i would like to sum this to a global matrix say at the indices
100
-1
1000

with this i mean that i would like to assemble the first and third
column as
A(100,100) += 1
A(100,1000)+= 3
A(1000,100)+= 6
A(1000,1000)+=8
(i suppose those entries exist)
while i would like the second row and column NOT to be assembles (i
marked it as -1 for this reason)

I know of course that i could create a 
temp = 1 3
       6 8

and assemble it at the enries 100 1000 ... but this does not look as the
optimal solution

does it exist any way of doing this efficiently using
"SumIntoGlobalValues"? (something like marking with -1 as i did ... ) 

thanks in advance
Riccardo

-  
________________________________________________________________
Riccardo Rossi, Ph.D, Civil Engineer
member of the Kratos Group: kratos.cimne.upc.es
Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE)
Universidad Politécnica de Cataluña (UPC)
Edificio C-1, campus Norte UPC
Gran Capitan, s/n
08034 Barcelona, España
Tel. (+34) 93 401 73 99
________________________________________________________________

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On Sun, 2009-02-15 at 12:00 -0700,
trilinos-users-request at software.sandia.gov wrote:
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>    1. Re: Trilinos-Users Digest, Vol 42, Issue 5 (rrossi at cimne.upc.edu)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sat, 14 Feb 2009 21:00:39 +0100 (CET)
> From: rrossi at cimne.upc.edu
> Subject: Re: [Trilinos-Users] Trilinos-Users Digest, Vol 42, Issue 5
> To: trilinos-users at software.sandia.gov
> Message-ID:
> 	<34958.79.150.49.217.1234641639.squirrel at webmail.cimne.upc.es>
> Content-Type: text/plain; charset=iso-8859-1
> 
> Hi,
>       PyTrilinos also needs swig and numeric/numpy so you also need to add
> those packages for Ubuntu
> 
> greetings
> Riccardo
> 
>  Send Trilinos-Users mailing list submissions to
> > 	trilinos-users at software.sandia.gov
> >
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> > or, via email, send a message with subject or body 'help' to
> > 	trilinos-users-request at software.sandia.gov
> >
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> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Trilinos-Users digest..."
> >
> >
> > Today's Topics:
> >
> >    1. Trilinos prerequesites on Ubuntu 8.10/AMD 64 (Scott Askey)
> >    2. Re: Trilinos prerequesites on Ubuntu 8.10/AMD 64 (Kurtis Nusbaum)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Fri, 13 Feb 2009 03:29:08 -0800 (PST)
> > From: "Scott Askey" <scotta_2002 at yahoo.com>
> > Subject: [Trilinos-Users] Trilinos prerequesites on Ubuntu 8.10/AMD 64
> > To: trilinos-users at software.sandia.gov
> > Message-ID: <534287.63163.qm at web36506.mail.mud.yahoo.com>
> > Content-Type: text/plain; charset=us-ascii
> >
> > I just had to reinstall my os and lost my package list.  Can anyone
> > suggest the list of pacakges I need to install on an AMD_64/Ubuntu_8.10
> > box to expedite building Nox and Pytrilinos.  In the past I have had
> > trouble selecting the correct BLAS/LAPACK/ATLAS Fortran varieties.
> >
> > apt-get .... ?
> >
> > V/R
> >
> > Scott
> >
> >
> >
> >
> >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Fri, 13 Feb 2009 12:48:39 -0600
> > From: "Kurtis Nusbaum" <klnusbaum at gmail.com>
> > Subject: Re: [Trilinos-Users] Trilinos prerequesites on Ubuntu
> > 	8.10/AMD 64
> > To: scotta_2002 at yahoo.com
> > Cc: trilinos-users at software.sandia.gov
> > Message-ID:
> > 	<7b4ecb930902131048s77cb3b14x8113e8ffa680f892 at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > I'm also running trilinos on AMD64/Ubuntu 8.10. Most of the stuff you need
> > is just in the packages gcc, g++, and gfortran. But I'm pretty sure you
> > also
> > need the libblas-dev and liblapack-dev. So I think:
> >
> > sudo apt-get install gcc g++ gfortran libblas-dev liblapack-dev
> >
> > should take care of everything. IYou should have most of these installed
> > already any way. I think inorder to get Trilinos to compile for me, the
> > only
> > packages I had to explicitly install was gfortran. The rest were already
> > installed for me. If you plan on using MPI you should also install those
> > packages.
> >
> > -Kurtis
> >
> > On Fri, Feb 13, 2009 at 5:29 AM, Scott Askey <scotta_2002 at yahoo.com>
> > wrote:
> >
> >> I just had to reinstall my os and lost my package list.  Can anyone
> >> suggest
> >> the list of pacakges I need to install on an AMD_64/Ubuntu_8.10 box to
> >> expedite building Nox and Pytrilinos.  In the past I have had trouble
> >> selecting the correct BLAS/LAPACK/ATLAS Fortran varieties.
> >>
> >> apt-get .... ?
> >>
> >> V/R
> >>
> >> Scott
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> Trilinos-Users mailing list
> >> Trilinos-Users at software.sandia.gov
> >> http://software.sandia.gov/mailman/listinfo/trilinos-users
> >>
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