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

[Su, Simon M CTR USARMY ARL (US)]

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


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