[vtkusers] Parallel coordinates Extraction

[Darshan Pai]

Oh ok , so i guess it somehow picks up the internal arrays from the
RTanalyticsSOurce.
Is there anyway to have some of the lines as different colors ? I mean like
categorical data.
There is also a Parallel Coordinates in the Charts too .

On Fri, Mar 25, 2011 at 10:38 PM, David Doria <daviddoria at gmail.com> wrote:

> On Fri, Mar 25, 2011 at 8:12 PM, Darshan Pai <darshanpai at gmail.com> wrote:
> >
> > This example
> >
> http://www.vtk.org/Wiki/VTK/Examples/Python/Infovis/ParallelCoordinatesExtraction
> > I can run it , but can someone please explain this part in the code
> > rep.SetInputArrayToProcess(0,0,0,0,'RTDataGradient')
> > rep.SetInputArrayToProcess(1,0,0,0,'RTData')
> > rep.SetInputArrayToProcess(2,0,0,0,'Elevation')
> > rep.SetInputArrayToProcess(3,0,0,0,'BrownianVectors')
> >
> > How is this data acquired ? I never used Infovis before so I am not clear
> what these lines are doing exactly
> > Thanks in advance
> > Darshan
>
> The SetInputArrayToProcess function is among the most confusing ones I
> have encountered (it doesn't have anything to do with vtkInfovis)
>
>
> http://www.vtk.org/doc/nightly/html/classvtkAlgorithm.html#a6bea16e1329609dbccce0ff8d2367484
>
> I believe all that is happening is the arrays RTDataGradient, RTData,
> Elevation, BrownianVectors are being set as vertical axes in the
> parallel coordinate representation. The first parameter, 'idx', is
> setting the 0th array, the 1st array, etc. I just always put 0's for
> the rest of the arguments.
>
> It has always seemed to me that for saneness there should be a
>
> void SetInputArrayToProcess (int idx, const char *name)
>
> so the explanation of "I don't know, just put 0's" doesn't ever have to be
> used.
>
> David
>
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