First input T is a triangulation connectivity indices list (triplet list of indices -positive integers-, each index refering to a vertex number in a corresponding vertices list).
Second input i is a vertex index (positive integer).
The purpose of this function is to query the list L of all i neighbor indices.
For instance if
T = [1 2 4;...
2 3 4;...
5 6 8;...
6 7 8;...
1 2 5;...
2 5 6;...
2 3 6;...
3 6 7;...
3 4 7;...
4 7 8;...
4 1 8;...
1 8 5]
and i = 3, then the function should return
L = [2, 4, 6, 7]
since 2, 4, 6, and 7 are all part of triangles / rows in which 3 is also a vertex member.
Hypothesis :
- Output L doesn't need to be ordered, but must not contain duplicated index.
- Output L is a row vector , and if the vertex index is not in the list , the function must of course return the empty set, [].
See also
Solve

Solution Stats

46 Solutions

30 Solvers

Last Solution submitted on May 24, 2026

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers30

Chris Cleveland Sebastian Shane Coffey Lorenzo

Suggested Problems

More from this Author42

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!