[petsc-users] Trying to modify petrbf to use custom text file

[Matthew Knepley]

On Wed, Mar 27, 2013 at 11:58 AM, Anil . <dasans at gmail.com> wrote:

> Matt,
>
> I am having around 3481 particles that are placed in an unstructured
> manner.
> Attached is the image showing the distribution.
>

Show me your PETSc options, and try playing with the number of blocks. If
you look
at the PetRBF paper, we give guidance for choosing the sizes.

   Matt


>
> On Tue, Mar 26, 2013 at 11:45 PM, Matthew Knepley <knepley at gmail.com>wrote:
>
>> On Mon, Mar 25, 2013 at 10:38 PM, Anil . <dasans at gmail.com> wrote:
>>
>>> 1) Could not find the petrbf mailing list
>>> 2) Petrbf runs perfectly
>>> 3) Attached is the output with -ksp_view -ksp_monitor
>>>
>>> Just point me in the right direction. Issues might be very basic as I am
>>> starting to use Petsc
>>>
>>
>> This output is a little strange. Some partitions have 0 entries. I am
>> guessing this problem is very
>> small. For PeRBF, it does turn out to be optimal to use small blocks, but
>> the block size depends
>> on your interaction scale. Right now you have 75 blocks, which might be
>> too many for your small
>> problem.
>>
>>    Matt
>>
>>
>>> On Sat, Mar 23, 2013 at 2:18 AM, Matthew Knepley <knepley at gmail.com>wrote:
>>>
>>>> On Fri, Mar 22, 2013 at 10:58 PM, Anil . <dasans at gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I have a text file containing N rows.
>>>>> Each row with x,y,omega values.
>>>>> I am trying to interpolate this data onto a regular grid using petrbf
>>>>> But the KSP does not converge and am not able to find the reason.
>>>>>
>>>>> The code is available with the text files at
>>>>> https://www.dropbox.com/s/cypuwugbxo07kx0/rbf-interpolation.tar.gz
>>>>>
>>>>> I am very new to petsc and any direction how o proceed would be
>>>>> helpful.
>>>>>
>>>>
>>>> 1) Did you mail the petrbf list?
>>>>
>>>> 2) Could you run the petrbf examples?
>>>>
>>>> 3) We cannot tell anything about convergence without the output of
>>>> -ksp_view -ksp_monitor.
>>>>
>>>>    Matt
>>>>
>>>>
>>>>> --
>>>>> Sincerely
>>>>> Anil Das P V
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> 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
>>>>
>>>
>>>
>>>
>>> --
>>> Sincerely
>>> Anil Das P V
>>>
>>
>>
>>
>> --
>> 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
>>
>
>
>
> --
> Sincerely
> Anil Das P V
>



-- 
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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