[Paraview] [EXTERNAL] Extracting min/max values of current data range as a variable in python

[Jamison, Ryan Dale]

Andy,

I combined the Extract Filter Block with the example you outlined below and it worked! I was able to use GetRange() to get the minimum and maximum of the array for the current time.

On a side note, other than GetRange(), what else can be done with data from GetArray()?

Best, Ryan

On Apr 11, 2017, at 7:46 PM, Andy Bauer <andy.bauer at kitware.com<mailto:andy.bauer at kitware.com>> wrote:

Hi,

Besides Yoshimi's way, you should be able to do something like the following from pvpython, pvbatch or Python shell.
yourfilter.PointData.GetArray(<arrayname>).GetRange() # or CellData

For example, for a Python script for a Wavelet source you would do the following:
w = Wavelet()
w.UpdatePipeline() # needed to execute the pipeline to create the output
w.PointData.GetArray("RTData").GetRange()

This will work for the output of a filter that returns a regular VTK data set or a multiblock data set. If you want the range for only a single block of a multiblock I'd recommend using the Extract Block filter to get that block. It should be a shallow copy of the data set to do that so it should be very fast, even if you don't need the output of the Extract Block filter for anything else.

Best,
Andy

On Tue, Apr 11, 2017 at 9:29 PM, kenichiro yoshimi <rccm.kyoshimi at gmail.com<mailto:rccm.kyoshimi at gmail.com>> wrote:
Hi,

I also want to know if there is a simple way to do, since I only have
the somewhat redundant code:
---
source = GetActiveSource()

#options for component: -1, 0, 1 and 2 => Mag, X, Y, Z
component = -1

cdi = source.GetDataInformation().GetCompositeDataInformation()

for i in range(cdi.GetNumberOfChildren()):
  print 'Block Name: ', cdi.GetName(i)

  data = cdi.GetDataInformation(i).GetCellDataInformation()
  for j in range(data.GetNumberOfArrays()):
    array = data.GetArrayInformation(j)
    arrayName = array.GetName()
    dataRange = array.GetComponentRange(component)
    print arrayName, dataRange
---

Thanks,
yoshimi

2017-04-12 6:10 GMT+09:00 Jamison, Ryan Dale <rdjamis at sandia.gov<mailto:rdjamis at sandia.gov>>:
> Hello Everyone,
>
> I’m wanting to gain more control over automation with my paraview python
> scripts. This time around, I’d like to be able to extract information from
> the model and use it in my python script.
>
> For example, I’d like to extract the minimum and maximum values of a cell
> variable from a specific block and use those values in the python script.
> Once I extract this information, I’d use it for some additional processing.
> Something like:
>
> minValue, maxValue = someCoolParaviewFunction(blockName, variableName)
>
> Is this possible? If so, any suggestions on how to do it?
>
> Thanks,
>
> Ryan
>
> _______________________________________________
> Powered by www.kitware.com<http://www.kitware.com/>
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Search the list archives at: http://markmail.org/search/?q=ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/paraview
>
_______________________________________________
Powered by www.kitware.com<http://www.kitware.com/>

Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html

Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView

Search the list archives at: http://markmail.org/search/?q=ParaView

Follow this link to subscribe/unsubscribe:
http://public.kitware.com/mailman/listinfo/paraview


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/paraview/attachments/20170412/32779768/attachment.html>