Transforming columns of a csv file into a vector field for Stream tracer

ParaView Support
1

I have a CSV file containing six columns - x, y, z, Jx, Jy, Jz. I need to create streamlines to visualise the vector field J. What is the correct way to do so?

I tried several things but neither worked out so far. I tried Table to Structured Grid and specified the columns to Field 3, Field 4 and Field 5, i.e., the vector components. For Whole Extent, I entered the number of elements on the grid minus 1. In the output messages, It says that The input table must have exatly 1 rows. Currently it has 236196 rows. I don’t understand what it means.

image

I tried generating a generic file for a 3x3 grid and the Whole Extent 0 - 2 on all dimensions but that was not working, either.

I came across this thread where they suggested using the calculator filter.

I entered the following
“Field 3”*iHat+“Field 4”*jHat+“Field 5”*kHat

and in the Information section I can see a 2D array:
Result double [-4,4], [-4,4], [0, 3.5]

The Stream Tracer is grayed out. How can I turn the calculator output into a 3D array?

I use Paraview 5.12.0 on Windows.

2

Please share your data

1 Like
3

Hello,
I am cooperating with Maria Dimitrova, and the question arose of our common work. A small example file would be like
exam01.txt (510 Bytes)
the full data mentioned in the post is this (bzip2 ed):
all.txt.bz2 (2.3 MB)

Thank you & kind regards

4

Here it is:

image
image1080×813 87.9 KB

Here is the state file:

streamAndVol.pvsm (600.5 KB)

In short:

  • Open with the delimited text reader, with the right parameters
  • Figure out the extent (-40, 40, -40, 40, 0, 35)
  • TableToStructuredGrid
  • MergeVectorComponents
1 Like
5

I see now how it works, awesome, thank you very much indeed!
Raphael

1 Like
6

Thank you for the quick response! Works perfectly.