[Paraview] vtkTable and LineChart

[pat marion]

I think by default it will plot a line for each column in the table.  It
will use the cell value as the Y value, and the row index as the X value.
To change the behavior, you have to change two representation properties:


 rep.UseIndexForXAxis = 0

rep.XArrayName = 'foo'

This will plot all all the columns, except use the "foo" column as the X
values.  That means the line for the "foo" column is still displayed, and it
will be a diagonal line.

I just looked, and Paraview has one cheat hard coded- if there is a column
named "Time" or "arc_length" then it will be used automatically for the X
axis.

Pat

On Mon, Nov 29, 2010 at 4:11 PM, Michael Jackson <
mike.jackson at bluequartz.net> wrote:

> Thanks for the idea. I was trying to figure out the flow from reading the
> data into displaying the data hoping to reveal some sort of default or
> something. I was going to generate some fake CSV data and see how that
> reader does things hoping the CSV reader takes the first column as the
> x-axis.
>
> ___________________________________________________________
> Mike Jackson                      www.bluequartz.net
> Principal Software Engineer       mike.jackson at bluequartz.net
> BlueQuartz Software               Dayton, Ohio
>
>
>
> On Nov 29, 2010, at 4:08 PM, pat marion wrote:
>
>  Hi Mike,
>>
>> I'm not up to speed with the current chart api so I can't answer your
>> question... but maybe you could try doing it in the gui with python trace
>> enabled, then translate the generated python code into c++ for your plugin?
>>  Customizing the chart should be a matter of setting properties on the
>> representation and view, the data object itself doesn't have much say.
>>
>> Pat
>>
>> On Mon, Nov 29, 2010 at 1:41 PM, Michael Jackson <
>> mike.jackson at bluequartz.net> wrote:
>> I have some XY data that I would like to plot in ParaView. I currently
>> have a plugin that reads the data from our HDF5 file and into vtkTable
>> objects. Along the lines of a "Line Chart 101" question how do I
>> programmatically set the x-axis and y-axis columns?
>>
>> Thanks
>> ___________________________________________________________
>> Mike Jackson                      www.bluequartz.net
>> Principal Software Engineer       mike.jackson at bluequartz.net
>> BlueQuartz Software               Dayton, Ohio
>>
>>
>>
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