MatCreateMPIAIJWithSplitArrays

[Panyasantisuk Jarunan]

When I create a matrix with MatCreateMPIAIJWithSplitArrays, as it 
doesn't copy the values so I have to use MatSetValues to set the 
internal value?


-- 
Jarunan PANYASANTISUK
MSc. in Computational Mechanics
Erasmus Mundus Master Program
Ecole Centrale de Nantes
1, rue de la noë, 44321 NANTES, FRANCE



Barry Smith <bsmith at mcs.anl.gov> a écrit :

>
>    You should be able to use MatCreateMPIAIJWithSplitArrays(),  
> MatCreateMPIAIJWithArrays() or MatMPIAIJSetPreallocationCSR()
> from Fortran. Are you using PETSc 3.0.0?
>
>    The arguments for MatCreateMPIAIJWithArrays() or  
> MatMPIAIJSetPreallocationCSR() have the same meaning
> (in fact MatCreateMPIAIJWithArrays() essentially calls  
> MatCreateMPIAIJWithArrays()).
>
>    Barry
>
> On Jan 14, 2009, at 7:38 AM, Panyasantisuk Jarunan wrote:
>
>> Oh, I could not use MatCreateMPIAIJWithArrays either but the  
>> mechanism below works.
>>
>>     call MatCreate(PETSC_COMM_WORLD,D,ierr)
>>     call MatSetSizes(D,N,N,PETSC_DETERMINE,PETSC_DETERMINE,
>>    $     ierr)
>>     call MatSetType(D,MATMPIAIJ,ierr) ! to set type a parallel matrix
>>     call MatSetFromOptions(D,ierr)
>>     call MatMPIAIJSetPreallocationCSR(D,pointer,Column,v,ierr)
>>
>> Where pointer is start-row indices a
>>     Column is local column indices
>>     v is value
>>
>> Is there the different beteween the start-row indices in  
>> MatMPIAIJSetPreallocationCSR and row indices in  
>> MatCreateMPIAIJWithArrays ?
>>
>>
>>
>> Regards,
>> Jarunan
>>
>>
>>
>>
>> Hello,
>>
>> To define a matrix with arrays, I cannot use  
>> MatCreateMPIAIJWithSplitArrays in my program which is written in  
>> Fortran:
>>
>>     call MatCreateMPIAIJWithSplitArrays(PETSC_COMM_WORLD,N,N,
>>    $     PETSC_DETERMINE,PETSC_DETERMINE,pointer,column,v,opointer,
>>    $     oColumn,ov,D,ierr)
>>
>> The error is
>> F:246: undefined reference to `matcreatempiaijwithsplitarrays_'
>>
>> I could use MatCreateMPIAIJWithArrays but the off diagonal values  
>> are missing with this command.
>>
>> I would be appreciate for any advice. Thank you before hand.
>>
>> Regards,
>> Jarunan
>>
>>
>>
>>
>> -- 
>> Jarunan PANYASANTISUK
>> MSc. in Computational Mechanics
>> Erasmus Mundus Master Program
>> Ecole Centrale de Nantes
>> 1, rue de la noë, 44321 NANTES, FRANCE
>>
>>
>>
>>
>>
>
>