[Paraview] get the sum of a cell or point variable (UNCLASSIFIED)

[Utkarsh Ayachit]

Simon,

So there are two types of Python scripts in ParaView: the data processing
(which goes in programmable filter, python calculator etc.) and the
client-side. For automation, you'd be interested in the scripting the
client. For that, you have WriteData() (or something like that) in the
simple.py module (
http://www.paraview.org/ParaView3/Doc/Nightly/www/py-doc/paraview.simple.html).
It's not there yet, the code went in git/master earlier today. But you'll
be able to use Python trace to determine what call to use :).

Utkarsh


On Tue, Jul 22, 2014 at 4:20 PM, Su, Simon M CTR USARMY ARL (US) <
simon.m.su.ctr at mail.mil> wrote:

> Classification: UNCLASSIFIED
> Caveats: NONE
>
> Errr.... what would be the equivalent to "menu->save" in python script?
> Sorry
> for making it difficult as the whole thing is a part of a elaborate
> automation
> from running simulation to getting the final result. Calling python
> calculator
> to calculate sum will be in a script run with pvbatch in parallel
> environment.
> Is CSV file format the best format if I just want to write that sum value
> out
> to a file? Any example script on writing 1 variable to CSV file format?
>
> Thanks
> -simon
>
> -----Original Message-----
> From: Utkarsh Ayachit [mailto:utkarsh.ayachit at kitware.com]
> Sent: Tuesday, July 22, 2014 4:11 PM
> To: Su, Simon M CTR USARMY ARL (US)
> Cc: paraview at paraview.org
> Subject: Re: [Paraview] get the sum of a cell or point variable
> (UNCLASSIFIED)
>
> Hey, once the sum() is computed by the calculator, you can just use "save
> data" from the menu and save it out as a CSV :P.
>
> Utkarsh
>
>
> On Tue, Jul 22, 2014 at 3:49 PM, Su, Simon M CTR USARMY ARL (US)
> <simon.m.su.ctr at mail.mil> wrote:
>
>
>         Classification: UNCLASSIFIED
>         Caveats: NONE
>
>         Hi Utkarsh,
>
>         That's great. That will eliminate the programmable filter part of
> my
> pipeline.
>         You didn't happen to also pushed update to VTK/ParaView that will
> write the
>         expression "sum(EQPS)" to a file that will work in parallel, did
> you? :)
>
>         Thanks
>         -simon
>
>
>         -----Original Message-----
>         From: Utkarsh Ayachit [mailto:utkarsh.ayachit at kitware.com]
>         Sent: Tuesday, July 22, 2014 3:43 PM
>         To: Su, Simon M CTR USARMY ARL (US)
>         Cc: paraview at paraview.org
>         Subject: Re: [Paraview] get the sum of a cell or point variable
> (UNCLASSIFIED)
>
>         Simon,
>
>         As I am cleaning my inbox, I ran into this email. Since there have
> been other
>         emails about this I'll skip your original query :). Just wanted to
> give you
> an
>         update on recent developments in ParaView. We recently pushed
> updates to
>         VTK/ParaView to allow you to use Python calculator to compute
> "sum" in
>         parallel across all blocks in the dataset. e.g. for can.ex2, you
> can apply
> the
>         Python Calculator and select "Cell Data", with expression
> "sum(EQPS)" the
>         result array will have the true global sum. This also includes
> operations
> like
>         min/max/mean etc.
>
>         Utkarsh
>
>
>         On Wed, Jun 25, 2014 at 11:21 AM, Su, Simon M CTR USARMY ARL (US)
>         <simon.m.su.ctr at mail.mil> wrote:
>
>
>                 Classification: UNCLASSIFIED
>                 Caveats: NONE
>
>                 Hello,
>
>                 Running in PV client/server mode, is there a calculator
> function that
> will
>                 add up all the values of a variable (cell or point
> variable).
>
>                 I can use the programmable filter to write a python loop
> to iterate
> through
>                 all the cell/point of the variable and add them up. But,
> running in a
>                 client/server mode, how would you store that value? Can I
> just add a
> single
>                 value (not array) to the data? If so, what vtk data
> structure shall I
> use to
>                 store a double variable? vtk.vtkDouble()? Or is there a
> way to write
> that
>                 value out to a file. Running it in parallel, how would
> that be
> handled?
>
>                 Thanks
>                 -simon
>
>                 Classification: UNCLASSIFIED
>                 Caveats: NONE
>
>
>
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>
>
>
>         Classification: UNCLASSIFIED
>         Caveats: NONE
>
>
>
>
>
>
> Classification: UNCLASSIFIED
> Caveats: NONE
>
>
>
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