[Paraview] How to compute functions for all particles and plot as function of time

[Berk Geveci]

No problem.

On Mon, Feb 3, 2014 at 6:16 PM, William Oquendo <woquendo at gmail.com> wrote:
> Hi Berk, this is just awesome. Thanks a lot.
>
>
> On Mon, Feb 3, 2014 at 10:06 AM, Berk Geveci <berk.geveci at kitware.com>
> wrote:
>>
>> Here is a way of doing this. Apply a Programmable Filter with a script
>> like this:
>>
>> displ = inputs[0].PointData['DISPL']
>> val = numpy.sum(displ[:,0], 0)
>> a = vtk.vtkFloatArray()
>> a.SetName("Sumdispl")
>> a.InsertNextValue(val)
>> output.SetNumberOfRows(1)
>> output.AddColumn(a)
>>
>> Make sure that the output type is set to vtkTable. Also, you need a
>> ParaView compiled with Python and numpy support.
>>
>> Once you have the table, select the first row in the spreadsheet view.
>> Then apply Plot Selection Over Time.
>>
>> This is a bit more complicated if the data is multi-block or AMR. Let
>> me know if that is the case.
>>
>> Best,
>> -berk
>>
>>
>>
>> On Wed, Jan 29, 2014 at 6:50 PM, William Oquendo <woquendo at gmail.com>
>> wrote:
>> > Hi, thanks for your response.
>> > Yes, I have tried it, and although useful for the statistics, like
>> > average
>> > velocity magnitud, still does not allow
>> > me to extract what I really need, like the sum of every mass*|V|^2 for
>> > all
>> > particles as a function of time, and,
>> > in general,  a global function (a function which depends on all the
>> > particles) as function of time (array which
>> > seems to be hidden).
>> > Do you or anybody know if it is possible to configure the "Plot
>> > Selection
>> > Over Time" filter to add it some
>> > other function? or, is it possible to use the Python Calculator filter
>> > for
>> > this? can someone share and example?
>> > Thanks again for your kind response.
>> >
>> >
>> > On Tue, Jan 28, 2014 at 9:32 PM, Utkarsh Ayachit
>> > <utkarsh.ayachit at kitware.com> wrote:
>> >>
>> >> Have you tried selecting all the particles, then applying "Plot
>> >> Selection
>> >> Over Time", however this time checking the "Only report selection
>> >> statistics" property?
>> >>
>> >>
>> >> On Tue, Jan 28, 2014 at 2:01 PM, William Oquendo <woquendo at gmail.com>
>> >> wrote:
>> >>>
>> >>> Dear all,
>> >>> I have a system of particles printed on vtp files. I am visualising
>> >>> them
>> >>> on Paraview, and want to analyse some dynamic info. Each particle has
>> >>> its
>> >>> own position and velocity vectors, and mass (scalar) as well, plus
>> >>> some
>> >>> other scalars and vectors not relevant now. Let/s say that I want to
>> >>> plot
>> >>> the total kinetic energy as a function of time. I was able to plot the
>> >>> individual kinetic energies per particle for each time (using the
>> >>> calculator
>> >>> and plot data filters), and also to plot the kinetic energy for a
>> >>> single
>> >>> selected  particle as function of time (after selecting the particle
>> >>> and
>> >>> using the plot selection over time filter). But I haven't found how to
>> >>> use
>> >>> the Python calculator or similar to compute that aggregate quantity
>> >>> (total
>> >>> kinetic energy in this example), and to plot it as a function of time.
>> >>> Any help is greatly appreciated.
>> >>>
>> >>> --
>> >>>
>> >>> Best regards / Cordialmente,
>> >>>
>> >>> William-Fernando Oquendo
>> >>> --------------------------
>> >>> Este correo puede carecer de tildes o eñes debido al teclado.
>> >>>
>> >>>
>> >>> _______________________________________________
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>> >>
>> >
>> >
>> >
>> > --
>> >
>> > Best regards / Cordialmente,
>> >
>> > William-Fernando Oquendo
>> > --------------------------
>> > Este correo puede carecer de tildes o eñes debido al teclado.
>> >
>> >
>> > _______________________________________________
>> > Powered by 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
>> >
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>> > http://www.paraview.org/mailman/listinfo/paraview
>> >
>
>
>
>
> --
>
> Best regards / Cordialmente,
>
> William-Fernando Oquendo
> --------------------------
> Este correo puede carecer de tildes o eñes debido al teclado.
>