# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=90

[Latest](https://discourse.paraview.org/latest.md) · [Categories](https://discourse.paraview.org/categories.md) · [Tags](https://discourse.paraview.org/tags.md)

**Page:** 91

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## [Cannot add light at the comparative view](https://discourse.paraview.org/t/cannot-add-light-at-the-comparative-view/10906)

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**Author:** [@xutao](https://discourse.paraview.org/u/xutao)\
**Replies:** 1\
**Last updated:** [December 5, 2022, 9:20am UTC](https://discourse.paraview.org/t/cannot-add-light-at-the-comparative-view/10906 "2022-12-05T09:20:22Z")

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## [Paraview Glyph using in or out of plane symbols](https://discourse.paraview.org/t/paraview-glyph-using-in-or-out-of-plane-symbols/10904)

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**Author:** [@yejinhong10](https://discourse.paraview.org/u/yejinhong10)\
**Replies:** 1\
**Last updated:** [December 5, 2022, 9:15am UTC](https://discourse.paraview.org/t/paraview-glyph-using-in-or-out-of-plane-symbols/10904 "2022-12-05T09:15:11Z")

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Hello, I am a newbie for ParaView and thank you guys for your help! I am trying to visualize using in or out of plane symbols and if there is a way to make Glyph Type of these symbols? Thanks

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## [Creating a tree with different data at each node](https://discourse.paraview.org/t/creating-a-tree-with-different-data-at-each-node/10910)

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**Author:** [@Juan\_Jose\_Casafranca](https://discourse.paraview.org/u/Juan_Jose_Casafranca)\
**Replies:** 0\
**Last updated:** [December 3, 2022, 1:07pm UTC](https://discourse.paraview.org/t/creating-a-tree-with-different-data-at-each-node/10910 "2022-12-03T13:07:47Z")

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I have a Newton based optimizer and I am extracting some information into a tree like structure. My data looks something like this: Optimizer objective function initial value (double) Newton iteration CG Solver itera…

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## [Extract subset from unstructured dataset into spatial uniform grid](https://discourse.paraview.org/t/extract-subset-from-unstructured-dataset-into-spatial-uniform-grid/10899)

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**Author:** [@catiocean](https://discourse.paraview.org/u/catiocean)\
**Replies:** 0\
**Last updated:** [December 2, 2022, 7:24am UTC](https://discourse.paraview.org/t/extract-subset-from-unstructured-dataset-into-spatial-uniform-grid/10899 "2022-12-02T07:24:53Z")

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Hello, My question is about how to create a spatially evenly distributed (approximately) vector field from unstructured grid. I am working on generating tidal current velocity field in a coastal area using Glyph. Howev…

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## [Is it possible to reload vtkjs file into paraview ?](https://discourse.paraview.org/t/is-it-possible-to-reload-vtkjs-file-into-paraview/10853)

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**Author:** [@nennigb](https://discourse.paraview.org/u/nennigb)\
**Replies:** 4\
**Last updated:** [December 2, 2022, 3:54pm UTC](https://discourse.paraview.org/t/is-it-possible-to-reload-vtkjs-file-into-paraview/10853 "2022-12-02T15:54:06Z")

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I have some vtkjs files that I have created outside paraview that I would like to reload into paraview. I know that I can export a scene from paraview to vtjs format, but is it possible to do the opposite ? If not, is …

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## [Results superposition](https://discourse.paraview.org/t/results-superposition/10854)

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**Author:** [@FEngineer](https://discourse.paraview.org/u/FEngineer)\
**Replies:** 7\
**Last updated:** [December 2, 2022, 3:25pm UTC](https://discourse.paraview.org/t/results-superposition/10854 "2022-12-02T15:25:43Z")

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Hi, how can I add together results from 2 different output databases (with the same geometry) or 2 different frames within a single database ? In the case of linear structural FEA it’s often necessary to add together re…

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## [Show internal points in a structured grid](https://discourse.paraview.org/t/show-internal-points-in-a-structured-grid/9935)

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**Author:** [@AndreaGiorgio](https://discourse.paraview.org/u/AndreaGiorgio)\
**Replies:** 11\
**Last updated:** [December 2, 2022, 2:05pm UTC](https://discourse.paraview.org/t/show-internal-points-in-a-structured-grid/9935 "2022-12-02T14:05:59Z")

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Hello! I used Paraview in the past to visualize meshes and CFD results, now I start to use it to convert CSV data into structured grids by using the Table-to-structured-grid filter. I’m able to obtain the grid without …

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## [Gradient of tensor components](https://discourse.paraview.org/t/gradient-of-tensor-components/7218)

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**Author:** [@fra](https://discourse.paraview.org/u/fra)\
**Replies:** 3\
**Last updated:** [December 2, 2022, 12:44pm UTC](https://discourse.paraview.org/t/gradient-of-tensor-components/7218 "2022-12-02T12:44:49Z")

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Hello, I have an unstructured dataset with a vector field defined on it (vorticity). I generated the gradient tensor and I know that the components are given as a tuple from 0 to 8 as dw1/dx, dw1/dy, dw1/dz, dw2/dx… dw3…

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## [Particle tracking to extract velocity angle and temperature](https://discourse.paraview.org/t/particle-tracking-to-extract-velocity-angle-and-temperature/10895)

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**Author:** [@fujah06](https://discourse.paraview.org/u/fujah06)\
**Replies:** 0\
**Last updated:** [December 1, 2022, 7:25pm UTC](https://discourse.paraview.org/t/particle-tracking-to-extract-velocity-angle-and-temperature/10895 "2022-12-01T19:25:16Z")

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I am working on metal melting, and during the process there is eruption of particles in liquid form. These particles are moving at different velocity, angle and temperature. I will like to extract the velocity, angle and…

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## [Poor quality pdf export](https://discourse.paraview.org/t/poor-quality-pdf-export/4407)

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**Author:** [@Rem](https://discourse.paraview.org/u/Rem)\
**Replies:** 6\
**Last updated:** [December 1, 2022, 5:55pm UTC](https://discourse.paraview.org/t/poor-quality-pdf-export/4407 "2022-12-01T17:55:11Z")

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Hi all, I’m trying to export publication-quality vector graphics but struggle with the quality. im2.pdf (3.7 MB) I find the pdf export of really poor quality. Do you guys know how to increase it ? Cheers Rem

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## [SPH Volume Interpolator Volume Refinement in script](https://discourse.paraview.org/t/sph-volume-interpolator-volume-refinement-in-script/10887)

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**Author:** [@30Kaz](https://discourse.paraview.org/u/30Kaz)\
**Replies:** 1\
**Last updated:** [December 1, 2022, 5:00pm UTC](https://discourse.paraview.org/t/sph-volume-interpolator-volume-refinement-in-script/10887 "2022-12-01T17:00:33Z")

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I am using SPH Volume Interpolator, and in Volume refinement, I am trying to change refinement mode to “cell-size” and change the value in a script. However firstly, tracing doesn’t work here as I commented in this post.…

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## [Dynamic number of outputs for reader](https://discourse.paraview.org/t/dynamic-number-of-outputs-for-reader/10891)

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**Author:** [@Juan\_Jose\_Casafranca](https://discourse.paraview.org/u/Juan_Jose_Casafranca)\
**Replies:** 0\
**Last updated:** [November 30, 2022, 10:59pm UTC](https://discourse.paraview.org/t/dynamic-number-of-outputs-for-reader/10891 "2022-11-30T22:59:23Z")

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I have a cloth simulator and I am writing the output of the simulations in an HDF5 container. My simulations may contain a positive number of certain objects. For example, it may contain between N buttons. I am creating…

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## [Indicating a specific number of streamlines with a threshold for their length](https://discourse.paraview.org/t/indicating-a-specific-number-of-streamlines-with-a-threshold-for-their-length/10885)

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**Author:** [@Alis](https://discourse.paraview.org/u/Alis)\
**Replies:** 0\
**Last updated:** [November 30, 2022, 3:51pm UTC](https://discourse.paraview.org/t/indicating-a-specific-number-of-streamlines-with-a-threshold-for-their-length/10885 "2022-11-30T15:51:07Z")

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Hi all, I’m trying to find the length of streamlines in my domain. I want to indicate a specific number of streamlines, whose length is bigger than a value. I also need that these streamlines to be equally distributed i…

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## [Second Order Derivative](https://discourse.paraview.org/t/second-order-derivative/10874)

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**Author:** [@aishwaryavyas2995](https://discourse.paraview.org/u/aishwaryavyas2995)\
**Replies:** 5\
**Last updated:** [November 30, 2022, 11:07am UTC](https://discourse.paraview.org/t/second-order-derivative/10874 "2022-11-30T11:07:23Z")

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Hi, Does anybody know the convention for the output we get when we use the second-order derivative on the gradient of a velocity? I got a total of 27 outputs, but I am unsure what the order is. Please let me know.

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## [Scratch on unfolded cylinder](https://discourse.paraview.org/t/scratch-on-unfolded-cylinder/10774)

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**Author:** [@Marvin](https://discourse.paraview.org/u/Marvin)\
**Replies:** 7\
**Last updated:** [November 30, 2022, 11:05am UTC](https://discourse.paraview.org/t/scratch-on-unfolded-cylinder/10774 "2022-11-30T11:05:58Z")

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Hi, I use the following formula to unfold a cylinder coordsZ\*iHat+(atan(coordsX/coordsY)+(coordsY/abs(coordsY))1.57)(coordsX^2+coordsY^2)^(1/2)jHat+0kHat The cylinder is unfolded but the rendering is not good Do y…

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## [Slurm error when running pvserver with mpiexec.](https://discourse.paraview.org/t/slurm-error-when-running-pvserver-with-mpiexec/10858)

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**Author:** [@NotDrJeff](https://discourse.paraview.org/u/NotDrJeff)\
**Replies:** 6\
**Last updated:** [November 30, 2022, 9:05am UTC](https://discourse.paraview.org/t/slurm-error-when-running-pvserver-with-mpiexec/10858 "2022-11-30T09:05:20Z")

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Hello, I have downloaded a linux paraview-5.10 tarball (https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v5.10&type=binary&os=Linux&downloadFile=ParaView-5.10.0-osmesa-MPI-Linux-Python3.9…

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## [Algorithm / Integrator Type Particle Tracer / Path Filter](https://discourse.paraview.org/t/algorithm-integrator-type-particle-tracer-path-filter/10750)

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**Author:** [@alkali](https://discourse.paraview.org/u/alkali)\
**Replies:** 2\
**Last updated:** [November 30, 2022, 1:06am UTC](https://discourse.paraview.org/t/algorithm-integrator-type-particle-tracer-path-filter/10750 "2022-11-30T01:06:46Z")

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Hi, which integrator / algorithm is implemented in PV for calulating the particle tracer / path filter? I can find Runge-Kutta for example for the Stream Tracer, but for the particle tracer there is unfornutately no in…

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## [Is it normal Python trace doesn't record some operation?](https://discourse.paraview.org/t/is-it-normal-python-trace-doesnt-record-some-operation/9477)

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**Author:** [@Chenxing\_Li](https://discourse.paraview.org/u/Chenxing_Li)\
**Replies:** 6\
**Last updated:** [November 29, 2022, 6:09pm UTC](https://discourse.paraview.org/t/is-it-normal-python-trace-doesnt-record-some-operation/9477 "2022-11-29T18:09:04Z")

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I can’t trace some parameter changes in StreamTracer Filter, when I change the center of Point Source. I feel a little weird. Is a bug or some founction tracer still in development?

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## [Fill Polygonal mesh with solid body / surface to solid](https://discourse.paraview.org/t/fill-polygonal-mesh-with-solid-body-surface-to-solid/10881)

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**Author:** [@Resa](https://discourse.paraview.org/u/Resa)\
**Replies:** 0\
**Last updated:** [November 29, 2022, 10:12pm UTC](https://discourse.paraview.org/t/fill-polygonal-mesh-with-solid-body-surface-to-solid/10881 "2022-11-29T22:12:28Z")

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I want to compute the volume enclosed by a polygonal mesh surface. My thought was that for doing so I’ll have to create a solid body of the size of the surface. How do I fill the mesh?

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## [Loading new calculated parameters from a excel file](https://discourse.paraview.org/t/loading-new-calculated-parameters-from-a-excel-file/10879)

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**Author:** [@rnp](https://discourse.paraview.org/u/rnp)\
**Replies:** 0\
**Last updated:** [November 29, 2022, 6:41pm UTC](https://discourse.paraview.org/t/loading-new-calculated-parameters-from-a-excel-file/10879 "2022-11-29T18:41:17Z")

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Hello team, I have a large \*vtu files with many parameters. I want to do some further calculations on these parameters and visualize them. I know that there exist TabletoPoints filter, but I am looking to have visualiza…

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## [color legent](https://discourse.paraview.org/t/color-legent/10877)

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**Author:** [@saman89](https://discourse.paraview.org/u/saman89)\
**Replies:** 2\
**Last updated:** [November 29, 2022, 5:20pm UTC](https://discourse.paraview.org/t/color-legent/10877 "2022-11-29T17:20:57Z")

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hi everyone can we change the color legend like this? (text above annotation below)

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## [Exporting Data from Descriptive Statistics](https://discourse.paraview.org/t/exporting-data-from-descriptive-statistics/10811)

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**Author:** [@jgd2203](https://discourse.paraview.org/u/jgd2203)\
**Replies:** 4\
**Last updated:** [November 29, 2022, 4:15pm UTC](https://discourse.paraview.org/t/exporting-data-from-descriptive-statistics/10811 "2022-11-29T16:15:31Z")

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I have used the tracing function to create a script to extract some statistics (using descriptive statistics filter) based on the surfaces of my mesh. When I play back in Windows it seems to work fine. Basic Steps: (1)…

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## [Combine vtu files](https://discourse.paraview.org/t/combine-vtu-files/10872)

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**Author:** [@Dorian\_Trabichet](https://discourse.paraview.org/u/Dorian_Trabichet)\
**Replies:** 3\
**Last updated:** [November 29, 2022, 8:00am UTC](https://discourse.paraview.org/t/combine-vtu-files/10872 "2022-11-29T08:00:57Z")

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Hi all, I am generating vtu files from a parallel simulation, so that I get 100s of files per time step. I would like to combine these into one file per time step. How can I manage to do that using python ? Thx

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## [How to compressing / optimizing data image in paraview?](https://discourse.paraview.org/t/how-to-compressing-optimizing-data-image-in-paraview/10868)

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**Author:** [@1997best](https://discourse.paraview.org/u/1997best)\
**Replies:** 2\
**Last updated:** [November 28, 2022, 10:25pm UTC](https://discourse.paraview.org/t/how-to-compressing-optimizing-data-image-in-paraview/10868 "2022-11-28T22:25:03Z")

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Hi, I try to open my vtu file in Open SUSE. Ryzen 5800X / 64GB / GTX1080 My vtu file is quite large(\>5GB) and has many nodes (~ 1e7). When I open it and try to check my data graphically, it makes my computer too slow. …

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## [Programmable Filter Doesn't Update after Time step](https://discourse.paraview.org/t/programmable-filter-doesnt-update-after-time-step/10875)

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**Author:** [@Devin\_Richard\_Bayly](https://discourse.paraview.org/u/Devin_Richard_Bayly)\
**Replies:** 0\
**Last updated:** [November 28, 2022, 6:47pm UTC](https://discourse.paraview.org/t/programmable-filter-doesnt-update-after-time-step/10875 "2022-11-28T18:47:41Z")

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Hi there, I’m trying to take the difference of two timesteps of my data to isolate the sections of greatest change in a 2d mesh. When I manually click “apply” I see the results that I want, but when I attempt to click p…

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## [Programmable Source Simple 2d vtkImageData Output from numpy?](https://discourse.paraview.org/t/programmable-source-simple-2d-vtkimagedata-output-from-numpy/10846)

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**Author:** [@Devin\_Richard\_Bayly](https://discourse.paraview.org/u/Devin_Richard_Bayly)\
**Replies:** 5\
**Last updated:** [November 28, 2022, 5:00pm UTC](https://discourse.paraview.org/t/programmable-source-simple-2d-vtkimagedata-output-from-numpy/10846 "2022-11-28T17:00:43Z")

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I’m trying to understand how to turn my numpy arrays into a 2D vtkImageData paraview element. I was hoping that the documentation here would cover it, but their example is a 3d volumetric rendering example instead https:…

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## [Python shell won't work](https://discourse.paraview.org/t/python-shell-wont-work/10801)

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**Author:** [@Miraboreasau](https://discourse.paraview.org/u/Miraboreasau)\
**Replies:** 4\
**Last updated:** [November 28, 2022, 2:06pm UTC](https://discourse.paraview.org/t/python-shell-wont-work/10801 "2022-11-28T14:06:58Z")

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Hi, I have a python script that was working. But this afternoon, when I copy it into the shell, nothing happened. Can anyone help me copy this into your python shell of ParaView, and see if you can have an error in op…

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## [Running macro in batch mode](https://discourse.paraview.org/t/running-macro-in-batch-mode/10861)

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**Author:** [@Trophime](https://discourse.paraview.org/u/Trophime)\
**Replies:** 1\
**Last updated:** [November 28, 2022, 12:26pm UTC](https://discourse.paraview.org/t/running-macro-in-batch-mode/10861 "2022-11-28T12:26:07Z")

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Hi, I would like to automate some post-processing of my fem simulation. I’ve created some macros to do that. My problem now is that I cannot figure out how to call the macro directly from a command line on my linux bo…

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## [SPHVolumeInterpolator not working](https://discourse.paraview.org/t/sphvolumeinterpolator-not-working/10860)

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**Author:** [@30Kaz](https://discourse.paraview.org/u/30Kaz)\
**Replies:** 6\
**Last updated:** [November 28, 2022, 11:42am UTC](https://discourse.paraview.org/t/sphvolumeinterpolator-not-working/10860 "2022-11-28T11:42:27Z")

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I am trying to use SPHVolumeInterpolator, but nothing shows up so far, even though the points are clearly there as can be seen in TableToPoints1. What could I do? The input data has 5 columns. The zeroth is id, first to…

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## [Advice on building paraview (superbuild??) for OpenFOAM runTimePostProcessing](https://discourse.paraview.org/t/advice-on-building-paraview-superbuild-for-openfoam-runtimepostprocessing/8707)

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**Author:** [@aerogt3](https://discourse.paraview.org/u/aerogt3)\
**Replies:** 6\
**Last updated:** [November 28, 2022, 7:49am UTC](https://discourse.paraview.org/t/advice-on-building-paraview-superbuild-for-openfoam-runtimepostprocessing/8707 "2022-11-28T07:49:31Z")

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Hello, Recently I’ve been trying to use the runTimePostProcessing in OpenFOAM, and I cannot get any working paraview build out of the OpenFOAM packages. LLVM fails to build, so then no mesa/VTK/pv. I’ve been using the …

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