[Paraview] Visualizing histogram

[Mark Richardson]

Pat had some python code to test the chart python wrapping, but it doesn't look like it's in cvs. The api should be similar to c++ though. You can look at vtk/guisupport/qt/testing/cxx/TestVtkBarChartView.cxx as an example. You'll just have to convert it to python calls and import the right modules. I haven't played with vtk python, so I'm not sure what module the views show up in.

Mark

----- Original Message -----
From: "Jacques Papper" <jpapper at ara.co.uk>
To: "Mark Richardson" <mark at elemtech.com>
Cc: "paraview" <paraview at paraview.org>
Sent: Wednesday, February 11, 2009 4:38:09 AM GMT -07:00 US/Canada Mountain
Subject: RE: [Paraview] Visualizing histogram

How can I access this through pvpython ? 
Do you have any example to put me on the right track ?

Thanks
Jacques

-----Original Message-----
From: Mark Richardson [mailto:mark at elemtech.com] 
Sent: 10 February 2009 17:28
To: Jacques Papper
Cc: paraview
Subject: Re: [Paraview] Visualizing histogram


The new charts in vtk/guisupport/qt/chart have support for strings and
numbers on the axes. The old charts only support numbers. We're currently
integrating the new charts into paraview. Then, you'll be able to view the
vtkTable.

The chart views in vtk/guisupport/qt can be displayed using python. There
are some tests you can use as an example (I can't remember where they are at
the moment). I'm not sure how well that will work in paraview though. It may
have to be done stand-alone.

Mark Richardson

----- Original Message -----
From: "Jacques Papper" <jpapper at ara.co.uk>
To: "John Biddiscombe" <biddisco at cscs.ch>, "paraview"
<paraview at paraview.org>
Sent: Tuesday, February 10, 2009 9:30:29 AM GMT -07:00 US/Canada Mountain
Subject: [Paraview] Visualizing histogram

John, 

Thanks a lot for your help. I have re-used part of your code to create a
Multi-block to table filter. (Basically exactly the same as your
probeIntegration but without the integration step).
The problem I have now is in creating a histogram which has the Block Id
(String - first column of data in my vtkTable) on the x axis and the data on
the y axis. 
It seems that the histogram plotting capability in ParaView can not handle
String Ids instead of numbers.

- Has anyone implemented such capability ? 

- What is the best way to access the vtkTable object through Python directly
(to then possibly use some python plotting facility)?

- Is it possible to create an image (Jpg, png etc..) from Python of an XY
plot or a Bar Chart ?

Jacques PAPPER
Applied CFD Team Leader
Tel: +44 (0) 1234 324677


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