[Paraview] Sum two data array in paraview

[Jay Romero]

Thank you for the answer. Best regards. jay

On Thu, Apr 2, 2015 at 12:05 AM, Moreland, Kenneth <kmorel at sandia.gov>
wrote:

>   If I understand your question correctly, you are basically trying to
> take arrays computed from two different time steps and then add them
> together. This is (intentionally made) difficult in ParaView because
> ParaView makes sure that the time from the data is consistent across all
> data sets. Things would get pretty confusing otherwise.
>
>  That said, you should be able to hack what you want using the "Temporal
> Shift Scale" filter, which can mangle the time of a data set to be
> different than the global time. The following procedure should work.
>
>  1. Starting with your data loaded into ParaView. Let's say the data is
> coming from a pipeline object named OriginalData.
> 2. Set ParaView to be at animation time 2.
> 3. Add the calculator filter and create your result1 array.
> 4. Add the Temporal Shift Scale filter directly to OriginalData (not the
> calculator filter). Shift the time by 2.
> 5. Add a calculator filter to the Temporal Shift Scale filter and create
> the result2 array.
> 6. Use the Append Attributes filter with the two calculator filters as
> input.
> 7. You can then take the sum of result1 and result2 with the data from
> Append Attributes.
>
>  -Ken
>
>   From: Jay Romero <jayreno33 at gmail.com>
> Date: Tuesday, March 31, 2015 at 10:01 PM
> To: ParaView Mailing List <paraview at paraview.org>
> Subject: [EXTERNAL] [Paraview] Sum two data array in paraview
>
>   Hello
>
>  I want to use calculator or Python shell to sum two data arrays in
> paraview.
> In the calculator:
> At time dt =2, I create an array: result1 = pressure* 2.
> For next animation time, dt = 4:
> I create an array: result2 = pressure*4
> What I find that the result1 array has changed at time step =4.
> How I can retain original result1 array when I change the animation time
> to dt=4.
>
>  This way I want to take sum of result1 and result2 at two different time
> steps.
>
>  How we can achieve it in paraview?
>
>  Best regards
> Jay Reno
>
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