Ah I see. Since you have NumPy enabled, it would be simplest to use the Python Calculator with:
Q1 / Q4 Let me know if this does not work. I am not sure how functional Python Calculator was in 3.8. This would definitely work on the development version. As far as the Programmable Filter, it sounds like we need to make some improvements on iterating over blocks. The code that you use is incorrect but the correct version is not easy to write (although possible). By the way, if you use the development version, you will have access to whole lot more functions in the Python Calculator (and Programmable Filter). See http://www.paraview.org/Wiki/Python_Calculator -berk 2010/9/14 Aurélien Marsan <[email protected]>: > That's it. > In the Calculator, I would set the formula : Q1/Q4*iHat + Q2/Q4*jHat + > Q3/Q4*kHat. > > In the programmable filter, there is some facilities in order to use numpy > arrays. But what should be the dimensions of the numpy array if we want to > add a vector by doing something like "block.PointData.append(array, 'newQ')" > ? > > > Le 14 septembre 2010 17:15, Berk Geveci <[email protected]> a écrit : >> >> I am not sure that I understand. Are Q1 and Q2 vectors? Are you trying >> to divide the component by component? >> >> 2010/9/13 Aurélien Marsan <[email protected]>: >> > Hello, >> > >> > In order to calculate a new scalar (here for a multiblockdataset) >> > >> > pdi = self.GetInput() >> > >> > pdo = self.GetOutput() >> > >> > pdo.ShallowCopy(pdi) >> > >> > for block in output[0]: >> > >> > if block.GetNumberOfPoints() != 0: >> > >> > array = block.PointData['Q1'] / block.PointData['Q2'] >> > >> > block.PointData.append(array, 'newQ') >> > >> > For a new vector, I would like someone to explain a simple way to do >> > that. >> > (without many transpose, ravel, etc...) >> > Knowing that it does not work with array = >> > numpy.array([block.PointData['Q1'], block.PointData['Q2'], >> > block.PointData['Q3']]) / block.PointData['Q4'] >> > because of a problem of dimensions. >> > >> > Regards, >> > >> > A.Marsan >> > >> > 2010/9/10 <[email protected]> >> >> >> >> I have a couple of questions about using the Programmable Filter. I >> >> have >> >> imported Tecplot dataset with the following data: coordsX, coordsY, >> >> coordsZ, >> >> Q1, Q2, Q3, Q4, Q5. >> >> >> >> How would I create a new data array that is Q2^2+Q3^2+Q4^2? >> >> >> >> How would I create a new vector data array (similar to >> >> Q2*iHat+Q3*jHat+Q4*kHat in the Calculator Filter)? >> >> >> >> >> >> >> >> >> >> From: David E DeMarle <[email protected]> >> >> To: [email protected] >> >> Cc: [email protected] >> >> Date: 09/10/2010 01:24 PM >> >> Subject: Re: [Paraview] Calculator Filter -- Gradient >> >> Sent by: [email protected] >> >> ________________________________ >> >> >> >> >> >> On Fri, Sep 10, 2010 at 1:10 PM, <[email protected]> wrote: >> >> > I have two somewhat related questions: >> >> > >> >> > 1. Is it possible to calculate a gradient vector using the calculator >> >> > filter? >> >> >> >> No. The calculator filter does only element wise (cell by cell or >> >> point by point) computations. To compute the gradient you need >> >> information from neighboring elements. >> >> >> >> > >> >> > 2. Is it possible to define a new data array using a Python script >> >> > without >> >> > the calculator filter? Currently, I am using several Calculator >> >> > Filters >> >> > to >> >> > calculate CFD flow variables from the conservative variables. I use a >> >> > Python >> >> > script to create the Calculator Filters, but I'm wondering if I can >> >> > avoid >> >> > the Calculator Filter and directly generate new data arrays for >> >> > plotting. >> >> > >> >> >> >> Not with a python script (under the python shell) since that runs on >> >> the client and can't really manipulate the data (which lives on the >> >> server) directly. However, the python programmable filter runs on the >> >> server, and with that you can create new arrays, and access >> >> neighboring elements as well. >> >> See http://www.paraview.org/Wiki/Python_Programmable_Filter for >> >> examples. >> >> >> >> > David Parker >> >> > _______________________________________________ >> >> > 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 >> >> > >> >> > Follow this link to subscribe/unsubscribe: >> >> > http://www.paraview.org/mailman/listinfo/paraview >> >> > >> >> > >> >> _______________________________________________ >> >> 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 >> >> >> >> Follow this link to subscribe/unsubscribe: >> >> http://www.paraview.org/mailman/listinfo/paraview >> >> >> >> >> >> _______________________________________________ >> >> 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 >> >> >> >> Follow this link to subscribe/unsubscribe: >> >> http://www.paraview.org/mailman/listinfo/paraview >> >> >> > >> > >> > _______________________________________________ >> > 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 >> > >> > Follow this link to subscribe/unsubscribe: >> > http://www.paraview.org/mailman/listinfo/paraview >> > >> > > > _______________________________________________ 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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
