I have data for the displacements of 48 nodes on a cross-section of a brain and I need to determine strain. The data is in a CSV which is organized into columns like this: 1st column is x displacements for node 1, 2nd columns is z displacements for node 1, 3rd columns is x for node 2 and so on. There are no displacements in the y direction. I imported the CSV as external data and created the necessary named selections on the model. The issue is when I try to assign the imported displacements to the named selection there's an error with weighting and I can't solve. Here's a picture of what it all looks like:
I would greatly appreciate it if someone could let me know what the issue here is, thank you!