I have multiple .csv files that I need to convert in ParaView. I have followed the following steps:

Open your .csv file, Apply

Filter → Table to points

Set X to x, Y to y, Z to z, Apply

Filter → Delaunay 3D, Apply

But ParaView gets stuck and crashes when I apply the Delaunay 3D filter. This is likely because my .csv is so large.

One .csv file that is 262,145 rows long took about 10 minutes to apply the Delaunay 3D filter. I have two more .csv files that are 2,097,151 rows and 16,777,215 rows long. Both are getting stuck and crashing after 5 HOURS. Is there some way I can automatically convert the .csv to an .xdmf or some other ParaView file? Or at least a quicker way??

Thanks for the quick reply. Do you mean using Table to Structured Grid instead of Table to Points? Or using Table to Points then Table to Structured Grid? After using Table to Structured Grid, how do I view it in 3D?

Honestly, I am not sure if my points are arranged into a grid. I am relatively new to excel. How do I check this?

The outer surface of the structured grid will be displayed as a solid surface by default.

What is your end goal? Do you want to see the X, Y, Z points in space? Or are you trying to create an unstructured grid from the points (that’s what Delaunay 3D does).

In that case, Table to Structured Grid should work, as long as your input XYZ points are ordered in a way such that they trace through lines of the grid structure systematically first along one dimension, then the next, then the third.

Set the Whole Extent to

0, nx-1
0, ny-1
0, nz-1

where nx, ny, and nz are the dimensions of your grid in the CSV file. Then choose the X Column array, Y Column array, and Z Column array to be the matching column from the CSV file.

I uploaded the .csv, and then used Table to Structured Grid with Whole Extent to 0-64 for each of the directions, as well as setting the columns properly. Nothing is showing up. Do I need another filter, too?

Here is one of the files that is smaller, only 4096 rows (16^3). The larger one is too large to upload. It is too large to even view in Excel at 2,097,152 rows long (128^3). By the way, I got the Table to Structured Grid working, but this is what it looks like:

I just want to double check something, the x, y, and z columns are the coordinates for the voxels (points). These coordinates remain the same, it is just sorted in the x column right? But the corresponding y and z values remain the same?