[Paraview] ParaView - Variables and different Time Steps

[Utkarsh Ayachit]

Carolin,

Check this post out:
https://blog.kitware.com/improved-vtk-numpy-integration-part-5/

The input to your filter as a vtkMultiBlockDataSet with each block
being a timestep, you can access individual arrays as described in the
post or you can use the following approach:

from paraview.vtk.numpy_interface import dataset_adapter as dsa
dataset_time0 = dsa.WrapDataObject(inputs[0].GetBlock(0))
dataset_time1 = dsa.WrapDataObject(inputs[0].GetBlock(1))

etc.

Utkarsh

On Thu, Jan 11, 2018 at 5:34 AM, Carolin Helbig <carolin.helbig at ufz.de> wrote:
> Dear Utkarsh,
>
> thank you very much for your help. It looks like it would work for my case,
> but I have some more question. How can I access the different time steps in
> the programmable filter? I thought they are the inputs (inputs[0],
> inputs[1], ...), but that doesn't work.
>
> Thanks again!
>
> Carolin.
>
>
>
> Am 10.01.2018 um 16:06 schrieb Utkarsh Ayachit:
>>
>> The easiest way to do such a thing is as follows:
>>
>> 1. Apply Extract TimeSteps filter to your reader/source to choose the
>> timesteps of interest.
>> 2. Apply Group TimeSteps filter to it to group the timesteps extracted
>> in (1) into a mutliblock dataset with 1 block for each selected
>> timestep in order.
>> 3. Now add your programmable filter to (2) and you can access all
>> timesteps of interest as blocks in your input.
>>
>> You can skip (1) if you want to use all timesteps, and not just a subset.
>>
>> Utkarsh
>>
>> On Wed, Jan 10, 2018 at 4:56 AM, Carolin Helbig <carolin.helbig at ufz.de>
>> wrote:
>>>
>>> Dear ParaView team,
>>>
>>> I read a post at the ParaView website concerning variables and different
>>> time steps (see
>>> https://public.kitware.com/pipermail/paraview/2014-May/031054.html). I
>>> have
>>> a similar problem and I want to access values from different time steps
>>> using the programmable filter with multiple inputs. I unfortunately have
>>> no
>>> idea how to access other time steps using the programmable filter. Could
>>> you
>>> give me some advice or a hint where I can find detailed information about
>>> that issue? I would be very happy if you could help me.
>>>
>>> Best regards,
>>> Carolin.
>>>
>>> --
>>> Dr. Carolin Helbig
>>>   Department Umweltinformatik
>>> Helmholtz-Zentrum für Umweltforschung GmbH - UFZ
>>> Permoserstraße 15 I 04318 Leipzig
>>> Tel.: +49 341 235 - 1032
>>> Email: carolin.helbig at ufz.de
>>> WWW: http://www.ufz.de
>>>       https://www.ufz.de/index.php?en=31616
>>>
>>>
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>
> --
> Dr. Carolin Helbig
>  Department Umweltinformatik
> Helmholtz-Zentrum für Umweltforschung GmbH - UFZ
> Permoserstraße 15 I 04318 Leipzig
> Tel.: +49 341 235 - 1032
> Email: carolin.helbig at ufz.de
> WWW: http://www.ufz.de
>      https://www.ufz.de/index.php?en=31616
>
>
> Sitz der Gesellschaft
> Registergericht: Amtsgericht Leipzig
> Handelsregister Nr.: B 4703
> Vorsitzender des Aufsichtsrats: MinDirig Wilfried Kraus
> Wissenschaftlicher Geschäftsführer: Prof. Dr. Dr. h.c. Georg Teutsch
> Administrative Geschäftsführerin: Prof. Dr. Heike Graßmann
>