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

[William Oquendo]

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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> >
>



-- 

Best regards / Cordialmente,

William-Fernando Oquendo
--------------------------
Este correo puede carecer de tildes o eñes debido al teclado.
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