[Paraview] Visualizing histogram

[pat marion]

Hi,

Sorry I missed this email until now.  I have some python code that
demonstrates how to use the new vtk based charts and vtkTable.  Using
this python interface it should be possible to save a screenshot of
the barchart or XY plot.  I have the code as a patch but it won't be
committed until after the vtk 5.4 release.

Pat

On Wed, Feb 11, 2009 at 12:10 PM, Mark Richardson <mark at elemtech.com> wrote:
>
> 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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