gdist_local_connectivity asymmetric

[JESUS CABRERA ALVAREZ]

Dear all,

I am using the tvb-gdist package to compute the local_connectivity over a mesh that I created. The algorithm works fine and creates the sparse matrices of local connectivity. However, I have observed that the eventual matrix is not symmetrical. I would interpret that as from vertex A to vertex B there is a different distance than from B to A. 

Can you help me understand this output? I have tested with two meshes of 8k and 17k vertices.

Thanks in advance,

[WOODMAN Michael]

hi,

Without further information, it sounds like a numerical error; in the short term you can do something like

G = (G + G.T)/2

If you want to open an issue on the tvb-gdist repository with the meshes in question? https://github.com/the-virtual-brain/tvb-gdist/issues

cheers,

Marmaduke

---

From: 'JESUS CABRERA ALVAREZ' via TVB Users <tvb-...@googlegroups.com>
Sent: Thursday, April 4, 2024 6:52:34 PM
To: TVB Users
Subject: [RESEAUX SOCIAUX] [TVB] gdist_local_connectivity asymmetric

 

Ce mail provient de l'extérieur, restons vigilants

--
You received this message because you are subscribed to the Google Groups "TVB Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to tvb-users+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/tvb-users/fa9a0ebf-3d60-4a24-b530-4acde9e2ebb9n%40googlegroups.com.