[Paraview] Variable that is difference between this time and time 0

[Magician]

HI Alan,


Sorry for the late response.

There are some techniques about comparing two datasets:
<http://www.google.co.jp/search?q=paraview+multiple+input>

If you can read initial and transient datasets with separated sources,
these techniques may be applicable:
  1. using Resample with Dataset and Calculator filter
  2. using Python Calculator with multiple inputs
  3. using Programmable Filter with multiple inputs (directly subtracting two datasets)
  4. using Programmable Filter with multiple inputs (storing two datasets into NumPy array with dataset adapter, and subtracting them)

I usually use 3rd method.
But I don’t have any good ideas deciding which the initial one is….


Magician


On Apr 18, 2014, at 14:00, paraview-request at paraview.org wrote:

> Message: 1
> Date: Thu, 17 Apr 2014 16:23:53 +0000
> From: "Scott, W Alan" <wascott at sandia.gov>
> To: "paraview at paraview.org" <paraview at paraview.org>
> Subject: [Paraview] Variable that is difference between this time and
> 	time 0
> Message-ID:
> 	<9047EE0D4D3C8E43B93980DA10A073809C2E5C45 at EXMB04.srn.sandia.gov>
> Content-Type: text/plain; charset="us-ascii"
> 
> 
> Can you perform mathematical operations (e.g. addition, subtraction) on variables between different time steps?
> 
> For example, if I have a point variable, can I compute the difference between that variable at time t with that variable at time zero?
> 
> Thanks!
> 
> Alan